diff --git a/app.js b/app.js
index f343703673275bd6a1a1e53a27d3055cdd2326e9..dcc56c03adc0476f9a365a184f6c16e66829a4d7 100644
--- a/app.js
+++ b/app.js
@@ -1,3 +1,4 @@
+
 // app.js
 
 require('dotenv').config();
@@ -6,23 +7,10 @@ const express = require('express');
 const session = require('express-session');
 const passport = require('./passport'); // 변경된 경로
 const flash = require('connect-flash');
-const { initScheduleCleaner } = require('./utils/scheduler');
-const connectMongoDB = require('./config/mongoose'); // MongoDB 연결
-const { sequelize } = require('./config/sequelize'); // Sequelize 연결
-const cors = require('cors');
+const { initScheduleCleaner } = require('./utils/scheduler'); // 유동 스케줄 자동 삭제 유틸
 
 const app = express();
 
-// CORS 설정
-app.use(
-  cors({
-    origin: 'http://localhost:3000', // 허용할 도메인 설정 (예: 프론트엔드 주소)
-    methods: ['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS'],
-    allowedHeaders: ['Content-Type', 'Authorization'],
-    credentials: true, // 쿠키와 인증 정보를 허용하려면 true로 설정
-  })
-);
-
 
 // 미들웨어 설정
 app.use(express.json());
@@ -47,43 +35,28 @@ app.use(flash());
 /**
  * 라우터 등록
  */
+// 로그인 라우터
 const authRoutes = require('./routes/auth');
 app.use('/auth', authRoutes);
 
+// Schedule 라우터
 const scheduleRoutes = require('./routes/schedule');
 app.use('/api/schedule', scheduleRoutes);
 
+// Friend 라우터
 const friendRoutes = require('./routes/friend');
 app.use('/api/friend', friendRoutes);
 
-const meetingRoutes = require('./routes/meetingRoute');
-app.use('/api/meeting', meetingRoutes);
 
-const chatRoutes = require('./routes/chatRoute');
-app.use('/api/chat', chatRoutes);
 
-// 스케줄 클리너 초기화
 initScheduleCleaner();
 
 const PORT = process.env.PORT || 3000;
 
-// MongoDB 및 MySQL 연결 후 서버 시작
-(async () => {
-  try {
-    // MongoDB 연결
-    await connectMongoDB();
-    console.log('✅ MongoDB 연결 성공');
-
-    // MySQL 연결 확인
-    await sequelize.authenticate();
-    console.log('✅ MySQL 연결 성공');
-
-    // 서버 시작
-    app.listen(PORT, () => {
-      console.log(`Server is running on http://localhost:${PORT}`);
-    });
-  } catch (error) {
-    console.error('❌ 서버 시작 중 오류 발생:', error);
-    process.exit(1);
-  }
-})();
\ No newline at end of file
+app.get('/', (req, res) => {
+  res.send('Hello, World!');
+});
+
+app.listen(PORT, () => {
+  console.log(`Server is running on http://localhost:${PORT}`);
+});
diff --git a/config/mongoose.js b/config/mongoose.js
index 692a4aa2a9d31e14916b06892469db5e81ad980e..3379779bf664ebd969317df7f7de48e7a74b34be 100644
--- a/config/mongoose.js
+++ b/config/mongoose.js
@@ -2,17 +2,17 @@
 
 const mongoose = require('mongoose');
 
-const connectMongoDB = async () => {
-  try {
-    await mongoose.connect(process.env.MONGODB_URI, {
-      useNewUrlParser: true,
-      useUnifiedTopology: true,
-    });
-    console.log('✅ MongoDB 연결 성공');
-  } catch (error) {
-    console.error('❌ MongoDB 연결 실패:', error);
-    throw error;
-  }
-};
+mongoose.connect(process.env.MONGO_URI, {
+  useNewUrlParser: true,
+  useUnifiedTopology: true,
+});
 
-module.exports = connectMongoDB;
\ No newline at end of file
+mongoose.connection.on('connected', () => {
+  console.log('Mongoose connected.');
+});
+
+mongoose.connection.on('error', (err) => {
+  console.error('Mongoose connection error:', err);
+});
+
+module.exports = mongoose;
diff --git a/controllers/chatController.js b/controllers/chatController.js
index 4c61e515f0748955dc020a4e21f4441ffcf7ffe5..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 100644
--- a/controllers/chatController.js
+++ b/controllers/chatController.js
@@ -1,105 +0,0 @@
-const chatService = require('../services/chatService');
-
-// 내부용 채팅방 생성
-exports.createChatRoomInternal = async (params) => {
-  try {
-    return await chatService.createChatRoom(params);
-  } catch (err) {
-    console.error('Error in createChatRoomInternal:', err);
-    return { success: false, error: err.message };
-  }
-};
-
-// 새 채팅방 생성
-exports.createChatRoom = async (req, res) => {
-  try {
-    const chatRoomId = await chatService.createChatRoom();
-    res.json({ chatRoomId });
-  } catch (err) {
-    console.error('Error creating room:', err);
-    res.status(500).json({ error: 'Failed to create room' });
-  }
-};
-
-// 채팅방 목록 조회
-exports.getChatRooms = async (req, res) => {
-  try {
-    const roomData = await chatService.getChatRooms();
-    res.json(roomData);
-  } catch (err) {
-    console.error('Error fetching rooms:', err);
-    res.status(500).json({ error: 'Failed to fetch rooms' });
-  }
-};
-
-// 사용자 상태 업데이트
-exports.updateStatus = async (req, res) => {
-  const { chatRoomId, nickname, isOnline } = req.body;
-  try {
-    await chatService.updateStatus(chatRoomId, nickname, isOnline);
-    res.status(200).json({ message: 'User status updated successfully' });
-  } catch (err) {
-    console.error('Error updating user status:', err);
-    res.status(500).json({ error: 'Failed to update user status' });
-  }
-};
-
-// 읽음 상태 업데이트
-exports.updateReadStatus = async (req, res) => {
-  const { chatRoomId, nickname } = req.body;
-  try {
-    await chatService.updateReadStatus(chatRoomId, nickname);
-    res.status(200).json({ message: 'Read status updated' });
-  } catch (err) {
-    console.error('Error updating read status:', err);
-    res.status(500).json({ error: 'Failed to update read status' });
-  }
-};
-
-// 읽지 않은 메시지 조회
-exports.getUnreadMessages = async (req, res) => {
-  const { nickname } = req.params;
-  try {
-    const unreadMessages = await chatService.getUnreadMessages(nickname);
-    res.status(200).json(unreadMessages);
-  } catch (err) {
-    console.error('Error fetching unread messages:', err);
-    res.status(500).json({ error: 'Failed to fetch unread messages' });
-  }
-};
-
-// 읽지 않은 메시지 수 조회
-exports.getUnreadCount = async (req, res) => {
-  const { chatRoomId } = req.params;
-  try {
-    const unreadCountMap = await chatService.getUnreadCount(chatRoomId);
-    res.status(200).json(unreadCountMap);
-  } catch (err) {
-    console.error('Error fetching unread counts:', err);
-    res.status(500).json({ error: 'Failed to fetch unread counts' });
-  }
-};
-
-// 읽은 로그 ID 업데이트
-exports.updateReadLogId = async (req, res) => {
-  const { chatRoomId, nickname, logId } = req.body;
-  try {
-    await chatService.updateReadLogId(chatRoomId, nickname, logId);
-    res.status(200).json({ message: 'Last read logID updated' });
-  } catch (err) {
-    console.error('Error updating last read logID:', err);
-    res.status(500).json({ error: 'Failed to update last read logID' });
-  }
-};
-
-// 상태와 로그 ID 동시 업데이트
-exports.updateStatusAndLogId = async (req, res) => {
-  const { chatRoomId, nickname, isOnline, logId } = req.body;
-  try {
-    await chatService.updateStatusAndLogId(chatRoomId, nickname, isOnline, logId);
-    res.status(200).json({ message: 'User status and lastReadLogId updated successfully' });
-  } catch (err) {
-    console.error('Error updating user status and lastReadLogId:', err);
-    res.status(500).json({ error: 'Failed to update user status and lastReadLogId' });
-  }
-};
\ No newline at end of file
diff --git a/controllers/meetingController.js b/controllers/meetingController.js
index 4860322910afe398d397dafe2a38044979d42930..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 100644
--- a/controllers/meetingController.js
+++ b/controllers/meetingController.js
@@ -1,68 +0,0 @@
-const MeetingService = require('../services/meetingService');
-
-class MeetingController {
-  async createMeeting(req, res) {
-    try {
-      const result = await MeetingService.createMeeting(req.body);
-      res.status(201).json(result);
-    } catch (err) {
-      console.error('번개 모임 생성 오류:', err);
-      res.status(500).json({ error: err.message || '번개 모임 생성 실패' });
-    }
-  }
-
-  async getMeetings(req, res) {
-    const { userId } = req.query;
-
-    if (!userId) {
-      return res.status(400).json({ error: '사용자 ID가 필요합니다.' });
-    }
-
-    try {
-      const meetings = await MeetingService.getMeetings(userId);
-      res.status(200).json(meetings);
-    } catch (err) {
-      console.error('모임 목록 조회 오류:', err);
-      res.status(500).json({ error: err.message || '모임 목록 조회 실패' });
-    }
-  }
-
-  async closeMeeting(req, res) {
-    const { meetingId } = req.params;
-
-    try {
-      const meeting = await MeetingService.closeMeeting(meetingId);
-      res.status(200).json({ message: '모임이 마감되었습니다.', meeting });
-    } catch (err) {
-      console.error('모임 마감 오류:', err);
-      res.status(500).json({ error: err.message || '모임 마감 실패' });
-    }
-  }
-
-  async joinMeeting(req, res) {
-    const { meetingId } = req.params;
-    const { user_id } = req.body;
-
-    try {
-      await MeetingService.joinMeeting(meetingId, user_id);
-      res.status(200).json({ message: '모임 및 채팅방 참가 완료' });
-    } catch (err) {
-      console.error('모임 참가 오류:', err);
-      res.status(500).json({ error: err.message || '모임 참가 실패' });
-    }
-  }
-
-  async getMeetingDetail(req, res) {
-    const { meetingId } = req.params;
-
-    try {
-      const meetingDetail = await MeetingService.getMeetingDetail(meetingId);
-      res.status(200).json(meetingDetail);
-    } catch (err) {
-      console.error('모임 상세 조회 오류:', err);
-      res.status(500).json({ error: err.message || '모임 상세 조회 실패' });
-    }
-  }
-}
-
-module.exports = new MeetingController();
\ No newline at end of file
diff --git a/dtos/MeetingDetailResponse.js b/dtos/MeetingDetailResponse.js
deleted file mode 100644
index 6670fe49a85573d4654b2e13c5b31a28572fbac0..0000000000000000000000000000000000000000
--- a/dtos/MeetingDetailResponse.js
+++ /dev/null
@@ -1,20 +0,0 @@
-class MeetingDetailResponse {
-  constructor(meeting) {
-    this.id = meeting.id;
-    this.title = meeting.title;
-    this.description = meeting.description;
-    this.startTime = meeting.start_time;
-    this.endTime = meeting.end_time;
-    this.location = meeting.location;
-    this.deadline = meeting.deadline;
-    this.type = meeting.type;
-    this.creatorName = meeting.creator ? meeting.creator.name : 'Unknown';
-    this.participants = meeting.participants.map(participant => ({
-      userId: participant.user_id,
-      name: participant.participantUser ? participant.participantUser.name : 'Unknown',
-      email: participant.participantUser ? participant.participantUser.email : 'Unknown'
-    }));
-  }
-}
-
-module.exports = MeetingDetailResponse; 
\ No newline at end of file
diff --git a/dtos/MeetingResponse.js b/dtos/MeetingResponse.js
deleted file mode 100644
index 8ee8b833c23b8ff6fb70d200f4384965230f57b5..0000000000000000000000000000000000000000
--- a/dtos/MeetingResponse.js
+++ /dev/null
@@ -1,19 +0,0 @@
-// dtos/MeetingResponse.js
-
-class MeetingResponse {
-  constructor(meeting, isParticipant, isScheduleConflict, creatorName) {
-    this.id = meeting.id;
-    this.title = meeting.title;
-    this.description = meeting.description;
-    this.startTime = meeting.start_time;
-    this.endTime = meeting.end_time;
-    this.location = meeting.location;
-    this.deadline = meeting.deadline;
-    this.type = meeting.type;
-    this.creatorName = creatorName;
-    this.isParticipant = isParticipant;
-    this.isScheduleConflict = isScheduleConflict;
-  }
-}
-
-module.exports = MeetingResponse;
\ No newline at end of file
diff --git a/models/chatRooms.js b/models/chatRooms.js
deleted file mode 100644
index ca68c3941a49d64f8abd4806c399793c03590301..0000000000000000000000000000000000000000
--- a/models/chatRooms.js
+++ /dev/null
@@ -1,21 +0,0 @@
-const mongoose = require('mongoose');
-
-// MongoDB 채팅방 스키마 수정 (현재 참가 중인 유저 목록 추가)
-const chatRoomsSchema = new mongoose.Schema({
-  chatRoomId: { type: String, required: true, unique: true },
-  messages: [{
-    sender: String,
-    message: String,
-    timestamp: Date,
-    type: { type: String, default: 'message' }  // 기본값은 'message', 다른 값으로 'join', 'leave' 가능
-  }],
-  participants: [{ type: String }],
-  lastReadAt: { type: Map, of: Date }, // 각 참가자의 마지막 읽은 메시지 시간 기록
-  lastReadLogId: { type: Map, of: String },  // 각 참가자의 마지막으로 읽은 logID 기록
-  isOnline: { type: Map, of: Boolean } // 각 참가자의 온라인 상태
-}, { collection: 'chatrooms' });
-
-// 모델이 이미 정의되어 있는 경우 재정의하지 않음
-const ChatRooms = mongoose.models.ChatRooms || mongoose.model('ChatRooms', chatRoomsSchema);
-
-module.exports = ChatRooms;
\ No newline at end of file
diff --git a/models/meeting.js b/models/meeting.js
index 14c50b58aa78c52bd14340c678778a49a8d1c994..7944e355fef21458c8550ce46bbb6eeb7e3cbc46 100644
--- a/models/meeting.js
+++ b/models/meeting.js
@@ -1,15 +1,10 @@
 // models/Meeting.js
 
 const { DataTypes } = require('sequelize');
-const { sequelize } = require('../config/sequelize');
+const sequelize = require('../config/sequelize');
 const User = require('./User');
 
 const Meeting = sequelize.define('Meeting', {
-  id: {
-    type: DataTypes.BIGINT,
-    primaryKey: true,
-    autoIncrement: true,
-  },
   title: {
     type: DataTypes.STRING,
     allowNull: false,
@@ -35,34 +30,12 @@ const Meeting = sequelize.define('Meeting', {
     type: DataTypes.ENUM('OPEN', 'CLOSE'),
     allowNull: false,
   },
-  created_by: {
-    type: DataTypes.BIGINT,
-    allowNull: false,
-    references: {
-      model: 'Users',
-      key: 'id',
-    },
-  },
-  chatRoomId: { // 새로운 필드 추가
-    type: DataTypes.STRING,
-    allowNull: false,
-  },
 }, {
   tableName: 'Meetings',
   timestamps: false,
 });
 
+Meeting.belongsTo(User, { foreignKey: 'created_by', as: 'creator' });
+User.hasMany(Meeting, { foreignKey: 'created_by', as: 'meetings' });
 
-// 연관 관계 설정
-Meeting.associate = (models) => {
-  Meeting.belongsTo(models.User, {
-    foreignKey: 'created_by', // FK 설정
-    as: 'creator', // 별칭
-  });
-  Meeting.hasMany(models.MeetingParticipant, {
-    foreignKey: 'meeting_id',
-    as: 'participants',
-  });
-};
-
-module.exports = Meeting;
\ No newline at end of file
+module.exports = Meeting;
diff --git a/models/meetingParticipant.js b/models/meetingParticipant.js
index 15c93c13aa7e6721fb250422333bcd772ffc0f1c..716a4420b9c9205398cd8d426b0e7ef4c349fad0 100644
--- a/models/meetingParticipant.js
+++ b/models/meetingParticipant.js
@@ -1,32 +1,19 @@
 // models/MeetingParticipant.js
 
 const { DataTypes } = require('sequelize');
-const { sequelize } = require('../config/sequelize');
+const sequelize = require('../config/sequelize');
+const Meeting = require('./Meeting');
+const User = require('./User');
 
-const MeetingParticipant = sequelize.define('MeetingParticipant', {
-  meeting_id: {
-    type: DataTypes.BIGINT,
-    allowNull: false
-  },
-  user_id: {
-    type: DataTypes.BIGINT,
-    allowNull: false
-  }
-}, {
+const MeetingParticipant = sequelize.define('MeetingParticipant', {}, {
   tableName: 'MeetingParticipants',
   timestamps: false,
 });
 
-MeetingParticipant.associate = (models) => {
-  MeetingParticipant.belongsTo(models.Meeting, {
-    foreignKey: 'meeting_id',
-    as: 'meeting'
-  });
+MeetingParticipant.belongsTo(Meeting, { foreignKey: 'meeting_id', as: 'meeting' });
+Meeting.hasMany(MeetingParticipant, { foreignKey: 'meeting_id', as: 'participants' });
 
-  MeetingParticipant.belongsTo(models.User, {
-    foreignKey: 'user_id',
-    as: 'participantUser'
-  });
-};
+MeetingParticipant.belongsTo(User, { foreignKey: 'user_id', as: 'user' });
+User.hasMany(MeetingParticipant, { foreignKey: 'user_id', as: 'meetingParticipations' });
 
 module.exports = MeetingParticipant;
diff --git a/models/user.js b/models/user.js
index cb14b0bc547c79ac88535d4d88c4a4331e6d113a..fbf92c144d9a6de814321390a784bc4c66c5d2eb 100644
--- a/models/user.js
+++ b/models/user.js
@@ -1,14 +1,9 @@
 // models/User.js
 
 const { DataTypes } = require('sequelize');
-const { sequelize } = require('../config/sequelize'); 
+const sequelize = require('../config/sequelize'); // sequelize 인스턴스 경로에 맞게 수정하세요.
 
 const User = sequelize.define('User', {
-  id: {
-    type: DataTypes.BIGINT, // 수정: id 필드를 BIGINT로 설정
-    autoIncrement: true,
-    primaryKey: true,
-  },
   name: {
     type: DataTypes.STRING, // VARCHAR
     allowNull: false,
@@ -26,17 +21,4 @@ const User = sequelize.define('User', {
   timestamps: true, // createdAt과 updatedAt 자동 관리
 });
 
-User.associate = (models) => {
-  User.hasMany(models.Meeting, {
-    foreignKey: 'created_by', 
-    as: 'createdMeetings', 
-  });
-
-  User.hasMany(models.MeetingParticipant, {
-    foreignKey: 'user_id',
-    as: 'userMeetingParticipations', 
-  });
-};  
-
-
 module.exports = User;
diff --git a/routes/chat.js b/routes/chat.js
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/routes/chatRoute.js b/routes/chatRoute.js
deleted file mode 100644
index 6ae03f13f5e429e9c245c289d859400f99ac799a..0000000000000000000000000000000000000000
--- a/routes/chatRoute.js
+++ /dev/null
@@ -1,14 +0,0 @@
-const express = require('express');
-const router = express.Router();
-const chatController = require('../controllers/chatController');
-
-router.post('/create-room', chatController.createChatRoom);
-router.get('/rooms', chatController.getChatRooms);
-router.post('/update-status', chatController.updateStatus);
-router.post('/update-read-status', chatController.updateReadStatus);
-router.get('/unread-messages/:nickname', chatController.getUnreadMessages);
-router.get('/unread-count/:chatRoomId', chatController.getUnreadCount);
-router.post('/update-status-and-logid', chatController.updateStatusAndLogId);
-router.post('/update-read-log-id', chatController.updateReadLogId);
-
-module.exports = router;
diff --git a/routes/meeting.js b/routes/meeting.js
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/routes/meetingRoute.js b/routes/meetingRoute.js
deleted file mode 100644
index a2788cad0c127f0b8014ffe20ccca7f86b061b9b..0000000000000000000000000000000000000000
--- a/routes/meetingRoute.js
+++ /dev/null
@@ -1,25 +0,0 @@
-// routes/meetingRoutes.js
-
-const express = require('express');
-const router = express.Router();
-const { isLoggedIn } = require('../middlewares/auth');
-const MeetingController = require('../controllers/meetingController');
-
-router.use(isLoggedIn);
-
-// 번개 모임 생성
-router.post('/', MeetingController.createMeeting);
-
-// 번개 모임 목록 조회
-router.get('/', MeetingController.getMeetings);
-
-// 번개 모임 마감
-router.put('/:meetingId/close', MeetingController.closeMeeting);
-
-// 번개 모임 참가
-router.post('/:meetingId/join', MeetingController.joinMeeting);
-
-// 번개 모임 상세 조회
-router.get('/:meetingId', MeetingController.getMeetingDetail);
-
-module.exports = router;
\ No newline at end of file
diff --git a/services/chatService.js b/services/chatService.js
deleted file mode 100644
index 4135d1581f9cf64efc6377c6d7cabb9313303a7f..0000000000000000000000000000000000000000
--- a/services/chatService.js
+++ /dev/null
@@ -1,149 +0,0 @@
-const ChatRoom = require('../models/chatRooms');
-const { v4: uuidv4 } = require('uuid');
-
-class ChatService {
-
-  // 채팅방 생성
-  async createChatRoom({ meeting_id, participants }) {
-    try {
-      const chatRoomId = uuidv4();
-      const newRoom = new ChatRoom({
-        chatRoomId: chatRoomId,
-        meeting_id,
-        participants,
-        messages: [],
-        lastReadAt: participants.reduce((acc, user) => {
-          acc[user] = new Date();
-          return acc;
-        }, {}),
-        lastReadLogId: participants.reduce((acc, user) => {
-          acc[user] = null;
-          return acc;
-        }, {}),
-        isOnline: participants.reduce((acc, user) => {
-          acc[user] = true;
-          return acc;
-        }, {}),
-      });
-
-      const joinMessage = {
-        message: `${participants[0]}님이 번개 모임을 생성했습니다.`,
-        timestamp: new Date(),
-        type: 'join',
-      };
-
-      newRoom.messages.push(joinMessage);
-      await newRoom.save();
-
-      return { success: true, chatRoomId };
-    } catch (err) {
-      console.error('Error creating chat room:', err);
-      throw new Error('Failed to create chat room');
-    }
-  }
-
-  // 채팅방 목록 조회
-  async getChatRooms() {
-    const rooms = await ChatRoom.find({}, { chatRoomId: 1, messages: { $slice: -1 } });
-    return rooms.map(room => {
-      const lastMessage = room.messages[0] || {};
-      return {
-        chatRoomId: room.chatRoomId,
-        lastMessage: {
-          sender: lastMessage.sender || '없음',
-          message: lastMessage.message || '메시지 없음',
-          timestamp: lastMessage.timestamp || null,
-        }
-      };
-    });
-  }
-
-  // 사용자 상태 업데이트
-  async updateStatus(chatRoomId, nickname, isOnline) {
-    await ChatRoom.updateOne(
-      { chatRoomId },
-      { $set: { [`isOnline.${nickname}`]: isOnline } }
-    );
-  }
-
-  // 읽음 상태 업데이트
-  async updateReadStatus(chatRoomId, nickname) {
-    const now = new Date();
-    await ChatRoom.updateOne(
-      { chatRoomId },
-      { $set: { [`lastReadAt.${nickname}`]: now } }
-    );
-  }
-
-  // 읽지 않은 메시지 조회
-  async getUnreadMessages(nickname) {
-    const chatRooms = await ChatRoom.find({ participants: nickname });
-    return await Promise.all(chatRooms.map(async (chatRoom) => {
-      const lastReadAt = chatRoom.lastReadAt.get(nickname) || new Date(0);
-      const unreadMessagesCount = chatRoom.messages.filter(message => 
-        message.timestamp > lastReadAt
-      ).length;
-      return {
-        chatRoomId: chatRoom.chatRoomId,
-        unreadCount: unreadMessagesCount,
-      };
-    }));
-  }
-
-  // 읽지 않은 메시지 수 조회
-  async getUnreadCount(chatRoomId) {
-    const chatRoom = await ChatRoom.findOne({ chatRoomId });
-    if (!chatRoom) {
-      throw new Error('Chat room not found');
-    }
-
-    const unreadCounts = chatRoom.participants
-      .filter(user => chatRoom.lastReadLogId.get(user))
-      .map(user => chatRoom.lastReadLogId.get(user))
-      .reduce((acc, logId) => {
-        acc[logId] = (acc[logId] || 0) + 1;
-        return acc;
-      }, {});
-
-    let count = 0;
-    return Object.entries(unreadCounts)
-      .sort(([logId1], [logId2]) => logId1.localeCompare(logId2))
-      .reduce((acc, [logId, value]) => {
-        count += value;
-        acc[count] = logId;
-        return acc;
-      }, {});
-  }
-
-  // 읽은 메시지 로그 ID 업데이트
-  async updateReadLogId(chatRoomId, nickname, logId) {
-    await ChatRoom.updateOne(
-      { chatRoomId },
-      { $set: { [`lastReadLogId.${nickname}`]: logId } }
-    );
-  }
-
-  // 상태와 로그 ID 동시 업데이트
-  async updateStatusAndLogId(chatRoomId, nickname, isOnline, logId) {
-    let finalLogId = logId;
-
-    if (!isOnline && logId === null) {
-      const chatRoom = await ChatRoom.findOne({ chatRoomId });
-      if (chatRoom && chatRoom.messages.length > 0) {
-        finalLogId = chatRoom.messages[chatRoom.messages.length - 1]._id;
-      }
-    }
-
-    await ChatRoom.updateOne(
-      { chatRoomId },
-      {
-        $set: {
-          [`isOnline.${nickname}`]: isOnline,
-          [`lastReadLogId.${nickname}`]: isOnline ? null : finalLogId,
-        },
-      }
-    );
-  }
-}
-
-module.exports = new ChatService();
diff --git a/services/meetingService.js b/services/meetingService.js
deleted file mode 100644
index 912a120a3881a985ac5e215da0a7fed6ba729bc5..0000000000000000000000000000000000000000
--- a/services/meetingService.js
+++ /dev/null
@@ -1,159 +0,0 @@
-const { v4: uuidv4 } = require('uuid');
-const { Meeting, MeetingParticipant, User } = require('../models');
-const ChatRoom = require('../models/chatRooms');
-const chatController = require('../controllers/chatController');
-const MeetingResponse = require('../dtos/MeetingResponse');
-const MeetingDetailResponse = require('../dtos/MeetingDetailResponse');
-
-class MeetingService {
-  async createMeeting(meetingData) {
-    const { title, description, start_time, end_time, location, deadline, type, created_by } = meetingData;
-
-    const user = await User.findOne({ where: { id: created_by } });
-    if (!user) {
-      throw new Error('사용자를 찾을 수 없습니다.');
-    }
-
-    const chatRoomData = {
-      participants: [user.name],
-    };
-    const chatRoomResponse = await chatController.createChatRoomInternal(chatRoomData);
-
-    if (!chatRoomResponse.success) {
-      throw new Error('채팅방 생성 실패');
-    }
-
-    const chatRoomId = chatRoomResponse.chatRoomId;
-
-    const newMeeting = await Meeting.create({
-      title,
-      description,
-      start_time,
-      end_time,
-      location,
-      deadline,
-      type,
-      created_by,
-      chatRoomId,
-    });
-
-    await MeetingParticipant.create({
-      meeting_id: newMeeting.id,
-      user_id: created_by,
-    });
-
-    return { meeting_id: newMeeting.id, chatRoomId: chatRoomResponse.chatRoomId };
-  }
-
-  async getMeetings(userId) {
-    const meetings = await Meeting.findAll({
-      attributes: ['id', 'title', 'description', 'start_time', 'end_time', 'location', 'deadline', 'type'],
-      include: [
-        {
-          model: User,
-          as: 'creator',
-          attributes: ['name'],
-        },
-        {
-          model: MeetingParticipant,
-          as: 'participants',
-          attributes: ['user_id'],
-        },
-      ],
-    });
-
-    return meetings.map((meeting) => {
-      const creatorName = meeting.creator ? meeting.creator.name : 'Unknown';
-      const isParticipant = meeting.participants.some(participant => participant.user_id === parseInt(userId, 10));
-
-      return new MeetingResponse(
-        meeting,
-        isParticipant,
-        false,
-        creatorName
-      );
-    });
-  }
-
-  async closeMeeting(meetingId) {
-    const meeting = await Meeting.findByPk(meetingId);
-    if (!meeting) {
-      throw new Error('모임을 찾을 수 없습니다.');
-    }
-
-    if (meeting.type === 'CLOSE') {
-      throw new Error('이미 마감된 모임입니다.');
-    }
-
-    meeting.type = 'CLOSE';
-    await meeting.save();
-    return meeting;
-  }
-
-  async joinMeeting(meetingId, userId) {
-    const meeting = await Meeting.findByPk(meetingId);
-    if (!meeting) {
-      throw new Error('모임을 찾을 수 없습니다.');
-    }
-
-    if(meeting.type === 'CLOSE') {
-      throw new Error('이미 마감된 모임입니다.');
-    }
-
-    if (new Date() > new Date(meeting.deadline)) {
-      throw new Error('참가 신청이 마감되었습니다.');
-    }
-
-    const existingParticipant = await MeetingParticipant.findOne({ 
-      where: { meeting_id: meetingId, user_id: userId } 
-    });
-    
-    if (existingParticipant) {
-      throw new Error('이미 참가한 사용자입니다.');
-    }
-
-    await MeetingParticipant.create({ meeting_id: meetingId, user_id: userId });
-
-    const user = await User.findOne({ where: { id: userId } });
-    const chatRoom = await ChatRoom.findOne({ meeting_id: meetingId });
-
-    if (chatRoom && !chatRoom.participants.includes(user.name)) {
-      chatRoom.participants.push(user.name);
-      chatRoom.isOnline.set(user.name, true);
-      chatRoom.lastReadAt.set(user.name, new Date());
-      chatRoom.lastReadLogId.set(user.name, null);
-      await chatRoom.save();
-    }
-  }
-
-  async getMeetingDetail(meetingId) {
-    const meeting = await Meeting.findByPk(meetingId, {
-      include: [
-        {
-          model: User,
-          as: 'creator',
-          attributes: ['name']
-        },
-        {
-          model: MeetingParticipant,
-          as: 'participants',
-          include: [
-            {
-              model: User,
-              as: 'participantUser',
-              attributes: ['name', 'email']
-            }
-          ]
-        }
-      ]
-    });
-
-    if (!meeting) {
-      throw new Error('모임을 찾을 수 없습니다.');
-    }
-
-    return new MeetingDetailResponse(meeting);
-  }
-}
-
-module.exports = new MeetingService();
diff --git a/wsServer.js b/wsServer.js
deleted file mode 100644
index 3f303b5db4c2b4aadd965b7adead567e547a4efc..0000000000000000000000000000000000000000
--- a/wsServer.js
+++ /dev/null
@@ -1,296 +0,0 @@
-const http = require('http');
-const crypto = require('crypto');
-// const ChatRoom = require('./models/chatRoom.js');
-const mongoose = require('mongoose');
-const ChatRoom = require('./models/chatRooms');
-
-// WebSocket 관련 데이터
-let clients = [];
-let chatRooms = {};
-
-// MongoDB 연결 설정
-async function connectMongoDB() {
-  try {
-    await mongoose.connect('mongodb://localhost:27017/chat', {
-      useNewUrlParser: true,
-      useUnifiedTopology: true,
-    });
-    console.log('MongoDB에 성공적으로 연결되었습니다.');
-
-    // MongoDB 연결 성공 후 WebSocket 서버 시작
-    startWebSocketServer();
-  } catch (err) {
-    console.error('MongoDB 연결 실패:', err);
-    process.exit(1);
-  }
-}
-
-// 채팅방 기록 불러오기 함수
-async function getChatHistory(chatRoomId) {
-  const chatRoom = await ChatRoom.findOne({ chatRoomId });
-  return chatRoom ? chatRoom.messages : [];
-}
-
-// WebSocket 서버 생성 및 핸드셰이크 처리
-function startWebSocketServer() {
-  const wsServer = http.createServer((req, res) => {
-    res.writeHead(200, { 'Content-Type': 'text/plain' });
-    res.end('WebSocket server is running');
-  });
-
-  wsServer.on('upgrade', (req, socket, head) => {
-    const key = req.headers['sec-websocket-key'];
-    const acceptKey = generateAcceptValue(key);
-    const responseHeaders = [
-      'HTTP/1.1 101 Switching Protocols',
-      'Upgrade: websocket',
-      'Connection: Upgrade',
-      `Sec-WebSocket-Accept: ${acceptKey}`
-    ];
-    socket.write(responseHeaders.join('\r\n') + '\r\n\r\n');
-
-    // 클라이언트를 clients 배열에 추가
-    clients.push(socket);
-
-    let chatRoomId = null;
-    let nickname = null;
-
-    socket.on('data', async buffer => {
-      let message;
-      try {
-        message = parseMessage(buffer);
-        const parsedData = JSON.parse(message);
-        const { type, chatRoomId: clientChatRoomId, nickname: clientNickname, text } = parsedData;
-
-        console.log('서버에서 수신한 메시지:', { type, clientChatRoomId, clientNickname, text });
-
-        if (type === 'join' || type === 'leave') {
-          await ChatRoom.updateOne(
-            { chatRoomId: clientChatRoomId },
-            { $set: { [`isOnline.${clientNickname}`]: type === 'join' } }
-          );
-
-          const statusMessage = {
-            type: 'status',
-            chatRoomId: clientChatRoomId,
-            nickname: clientNickname,
-            isOnline: type === 'join',
-          };
-
-          clients.forEach(client => {
-            client.write(constructReply(JSON.stringify(statusMessage)));
-          });
-        }
-
-        if (type === 'join') {
-          chatRoomId = clientChatRoomId;
-          nickname = clientNickname;
-          console.log("join시 chatRoomId", chatRoomId);
-          console.log("join시 nickname", nickname);
-
-          await ChatRoom.updateOne(
-            { chatRoomId },
-            {
-              $set: {
-                [`isOnline.${nickname}`]: true,
-                [`lastReadLogId.${nickname}`]: null,
-              },
-            }
-          );
-
-          if (!chatRooms[chatRoomId]) {
-            chatRooms[chatRoomId] = [];
-          }
-
-          const chatRoom = await ChatRoom.findOne({ chatRoomId });
-          console.log("join시 chatRoom", chatRoom);
-          if (!chatRoom) {
-            console.error(`ChatRoom을 찾을 수 없습니다: chatRoomId = ${chatRoomId}`);
-          } else {
-            console.log(`ChatRoom 조회 성공: ${chatRoom}`);
-          }
-
-          const isAlreadyParticipant = chatRoom.participants.includes(nickname);
-          if (!isAlreadyParticipant) {
-            const joinMessage = {
-              message: `${nickname}님이 참가했습니다.`,
-              timestamp: new Date(),
-              type: 'join'
-            };
-
-            chatRooms[chatRoomId].push(joinMessage);
-
-            await ChatRoom.updateOne({ chatRoomId }, {
-              $push: { messages: joinMessage, participants: nickname }
-            });
-
-            clients.forEach(client => {
-              client.write(constructReply(JSON.stringify(joinMessage)));
-            });
-          } else {
-            console.log(`${nickname}은 이미 채팅방에 참가 중입니다.`);
-          }
-
-          try {
-            const previousMessages = await getChatHistory(chatRoomId);
-            if (previousMessages.length > 0) {
-              socket.write(constructReply(JSON.stringify({ type: 'previousMessages', messages: previousMessages })));
-              console.log(`이전 메시지 전송: ${previousMessages.length}개`);
-            } 
-          } catch (err) {
-            console.error('이전 채팅 기록 불러오기 중 오류 발생:', err);
-          }
-
-        } else if (type === 'message') {
-          const chatMessage = {
-            message: text,
-            timestamp: new Date(),
-            type: 'message',
-            sender: nickname
-          };
-
-
-          chatRooms[chatRoomId].push(chatMessage);
-
-          try {
-            // 새로운 메시지를 messages 배열에 추가
-            const updatedChatRoom = await ChatRoom.findOneAndUpdate(
-              { chatRoomId }, 
-              { $push: { messages: chatMessage } },
-              { new: true, fields: { "messages": { $slice: -1 } } }  // 마지막 추가된 메시지만 가져옴
-            );
-
-            // 마지막에 추가된 메시지의 _id를 가져오기
-            const savedMessage = updatedChatRoom.messages[updatedChatRoom.messages.length - 1];
-
-            // 새로운 메시지 전송: 클라이언트로 메시지 브로드캐스트
-            const messageData = {
-              type: 'message',
-              chatRoomId,
-              sender: nickname,
-              message: text,
-              timestamp: chatMessage.timestamp,
-              _id: savedMessage._id  // 저장된 메시지의 _id 사용
-            };
-
-            clients.forEach(client => {
-              client.write(constructReply(JSON.stringify(messageData)));
-              console.log('채팅 메시지 전송:', messageData);
-            });
-  
-          } catch (err) {
-            console.error('MongoDB 채팅 메시지 저장 오류:', err);
-          }
-        } else if (type === 'leave') {
-          const leaveMessage = { message: `${nickname}님이 퇴장했습니다.`, timestamp: new Date() };
-          chatRooms[chatRoomId].push(leaveMessage);
-
-          await ChatRoom.updateOne(
-            { chatRoomId },
-            { $set: { [`isOnline.${nickname}`]: false } }
-          );
-
-          await ChatRoom.updateOne({ chatRoomId }, {
-            $push: { messages: leaveMessage },
-            $pull: { participants: nickname }
-          });
-
-          clients.forEach(client => {
-            client.write(constructReply(JSON.stringify(leaveMessage)));
-          });
-
-          clients = clients.filter(client => client !== socket);
-        }
-      } catch (err) {
-        console.error('메시지 처리 중 오류 발생:', err);
-      }
-    });
-
-    socket.on('close', async () => {
-      if (nickname && chatRoomId) {
-        await ChatRoom.updateOne(
-          { chatRoomId },
-          { $set: { [`isOnline.${nickname}`]: false } }
-        );
-
-        const statusMessage = {
-          type: 'status',
-          chatRoomId,
-          nickname,
-          isOnline: false,
-        };
-
-        clients.forEach(client => {
-          client.write(constructReply(JSON.stringify(statusMessage)));
-        });
-      }
-    });
-
-    socket.on('error', (err) => {
-      console.error(`WebSocket error: ${err}`);
-      clients = clients.filter(client => client !== socket);
-    });
-  });
-
-  wsServer.listen(8081, () => {
-    console.log('WebSocket 채팅 서버가 8081 포트에서 실행 중입니다.');
-  });
-}
-
-// Sec-WebSocket-Accept 헤더 값 생성 -> env처리
-function generateAcceptValue(key) {
-  return crypto.createHash('sha1').update(key + '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', 'binary').digest('base64');
-}
-
-// WebSocket 메시지 파싱 함수
-function parseMessage(buffer) {
-  const byteArray = [...buffer];
-  const secondByte = byteArray[1];
-  let length = secondByte & 127;
-  let maskStart = 2;
-
-  if (length === 126) {
-    length = (byteArray[2] << 8) + byteArray[3];
-    maskStart = 4;
-  } else if (length === 127) {
-    length = 0;
-    for (let i = 0; i < 8; i++) {
-      length = (length << 8) + byteArray[2 + i];
-    }
-    maskStart = 10;
-  }
-
-  const dataStart = maskStart + 4;
-  const mask = byteArray.slice(maskStart, dataStart);
-  const data = byteArray.slice(dataStart, dataStart + length).map((byte, i) => byte ^ mask[i % 4]);
-
-  return new TextDecoder('utf-8').decode(Uint8Array.from(data));
-}
-
-// 클라이언트 메시지 응답 생성 함수
-function constructReply(message) {
-  const messageBuffer = Buffer.from(message, 'utf-8');
-  const length = messageBuffer.length;
-  const reply = [0x81];
-  if (length < 126) {
-    reply.push(length);
-  } else if (length < 65536) {
-    reply.push(126, (length >> 8) & 255, length & 255);
-  } else {
-    reply.push(
-      127,
-      (length >> 56) & 255,
-      (length >> 48) & 255,
-      (length >> 40) & 255,
-      (length >> 32) & 255,
-      (length >> 24) & 255,
-      (length >> 16) & 255,
-      (length >> 8) & 255,
-      length & 255
-    );
-  }
-  return Buffer.concat([Buffer.from(reply), messageBuffer]);
-}
-
-// MongoDB 연결 후 WebSocket 서버 시작
-connectMongoDB();
\ No newline at end of file