diff --git a/public/index.html b/public/index.html
index f475e72240f36b4681e52d6dcb6ccf054cad3e67..9be1eb9fbad6a83c2f4df100a2d7a20ba9f23bb7 100644
--- a/public/index.html
+++ b/public/index.html
@@ -15,12 +15,7 @@
 
     <a href="http://kkj6235.ajousw.kr/testhomepage/">동료의 url</a>
 
-    <style>
-      div {
-          text-align: center;
-      }
-    </style>
-    <div>
+    <div class = "ajou">
       <img src="./Rafael_Nadal_Doha.jpg" width="200", height="200">
     </div>
     
@@ -41,14 +36,7 @@
     <h5>소속 : 아주대학교</h5>
     <h6>학번 : 201920738</h6>
 
-    <style>
-      p {color : black; 
-    background-color : lightgray;
-    font-size:30px;
-    font-family:serif;}
-    
-  </style>
-    <p> Welcome to Ajou University 배경색 lightgray, font-size 30px font-family는 serif</p>
+    <p class = "ajou1"> Welcome to Ajou University 배경색 lightgray, font-size 30px font-family는 serif</p>
 
   </body>
 </html>
diff --git a/public/style.css b/public/style.css
index 3eae4084bda0c2270306b14ac8c1ca732415edc3..0ace16ffe303d508701d707661aad729bab5d362 100644
--- a/public/style.css
+++ b/public/style.css
@@ -22,3 +22,13 @@ body {
   color: #ffffff;
 }
 
+.ajou {
+  text-align: center;
+}
+
+.ajou1 {color : black; 
+  background-color : lightgray;
+  font-size:30px;
+  font-family:serif;
+}
+