diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..5008ddf
Binary files /dev/null and b/.DS_Store differ
diff --git a/back/app.js b/back/app.js
index a5e9e50..e254aa7 100644
--- a/back/app.js
+++ b/back/app.js
@@ -22,7 +22,7 @@ const app = express();
 //     credentials: true
 //   }));
 app.use(cors({
-    origin: 'http://localhost:3000',  // 프론트 주소
+    origin: 'https://star-client-brown.vercel.app',  // 프론트 주소
     methods: ['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS'],
     allowedHeaders: ['Content-Type', 'Authorization'],
     credentials: true
diff --git a/front/.gitignore b/front/.gitignore
index 4d29575..966bc27 100644
--- a/front/.gitignore
+++ b/front/.gitignore
@@ -21,3 +21,4 @@
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+.env
\ No newline at end of file
diff --git a/front/src/api/axios.js b/front/src/api/axios.js
index 36869b6..23df202 100644
--- a/front/src/api/axios.js
+++ b/front/src/api/axios.js
@@ -1,7 +1,7 @@
 import axios from 'axios';
 
 const instance = axios.create({
-  baseURL: 'http://localhost:8080/api', // 변경 시 여기만 수정
+  baseURL: 'https://star-isih.onrender.com', // 변경 시 여기만 수정
   withCredentials: true
 });
 
diff --git a/front/src/pages/HotspotPage.js b/front/src/pages/HotspotPage.js
index 15f6fdb..6bb39d3 100644
--- a/front/src/pages/HotspotPage.js
+++ b/front/src/pages/HotspotPage.js
@@ -31,16 +31,16 @@ const HotspotPage = () => {
     try {
       let response;
       if (category === 'Auditorium Size / Large Hall') {
-        response = await axios.get('http://localhost:8080/api/analytics/popular-buildings/by-large-group');
+        response = await axios.get('https://star-isih.onrender.com/api/analytics/popular-buildings/by-large-group');
       } else if (category === 'Study Friendly') {
-        response = await axios.get('http://localhost:8080/api/analytics/popular-buildings/by-purpose?purpose=Study');
+        response = await axios.get('https://star-isih.onrender.com/api/analytics/popular-buildings/by-purpose?purpose=Study');
       } else if (category === 'Meeting & Presentation / Collab Zones') {
-        response = await axios.get('http://localhost:8080/api/analytics/popular-buildings/by-purpose?purpose=Meeting');
+        response = await axios.get('https://star-isih.onrender.com/api/analytics/popular-buildings/by-purpose?purpose=Meeting');
       }
 
       const hotspotData = Array.isArray(response.data) ? response.data : [response.data];
 
-      const allBuildingsRes = await axios.get('http://localhost:8080/api/buildings');
+      const allBuildingsRes = await axios.get('https://star-isih.onrender.com/api/buildings');
       const allBuildings = allBuildingsRes.data.buildings;
 
       const matched = hotspotData.map((item, i) => {
@@ -87,7 +87,7 @@ const HotspotPage = () => {
 
   const handleReserve = async (building) => {
     try {
-      const res = await axios.get(`http://localhost:8080/api/buildings/rooms?buildingNo=${building.id}`);
+      const res = await axios.get(`https://star-isih.onrender.com/api/buildings/rooms?buildingNo=${building.id}`);
       const availableRooms = res.data.rooms.map(room => ({
         room: `Room ${room}`,
         time: '8:00 - 17:50',
diff --git a/front/src/pages/LoginPage.js b/front/src/pages/LoginPage.js
index 7d1f69e..c5dbeb8 100644
--- a/front/src/pages/LoginPage.js
+++ b/front/src/pages/LoginPage.js
@@ -17,7 +17,7 @@ const LoginPage = () => {
 
   const handleLogin = async () => {
     try {
-      const res = await axios.post('http://localhost:8080/api/users/login', form);
+      const res = await axios.post('https://star-isih.onrender.com/api/users/login', form);
       localStorage.setItem('token', res.data.token);
       localStorage.setItem('user', JSON.stringify(res.data.user));
       navigate('/'); // ✅ 메인 페이지로 이동
diff --git a/front/src/pages/MyReservationPage.js b/front/src/pages/MyReservationPage.js
index 747eac3..22fc0fa 100644
--- a/front/src/pages/MyReservationPage.js
+++ b/front/src/pages/MyReservationPage.js
@@ -24,7 +24,7 @@ const MyReservationPage = () => {
   // 🧭 건물 리스트 받아오기
   const fetchBuildings = async () => {
     try {
-      const res = await axios.get('http://localhost:8080/api/buildings');
+      const res = await axios.get('https://star-isih.onrender.com/api/buildings');
       setBuildings(res.data.buildings || []);
     } catch (err) {
       console.warn('⚠️ 건물 정보 fetch 실패, fallback mock 사용');
@@ -39,7 +39,7 @@ const MyReservationPage = () => {
   const fetchReservations = async () => {
     try {
       const token = localStorage.getItem('token');
-      const res = await axios.get('http://localhost:8080/api/reservations/my', {
+      const res = await axios.get('https://star-isih.onrender.com/api/reservations/my', {
         headers: { Authorization: `Bearer ${token}` }
       });
       setReservations(res.data);
@@ -85,7 +85,7 @@ const MyReservationPage = () => {
   const confirmCancel = async () => {
     try {
       const token = localStorage.getItem('token');
-      await axios.delete(`http://localhost:8080/api/reservations/${selectedReservation._id}`, {
+      await axios.delete(`https://star-isih.onrender.com/api/reservations/${selectedReservation._id}`, {
         headers: { Authorization: `Bearer ${token}` }
       });
       setReservations(reservations.filter(r => r._id !== selectedReservation._id));
diff --git a/front/src/pages/ProfilePage.js b/front/src/pages/ProfilePage.js
index 22350ff..6603781 100644
--- a/front/src/pages/ProfilePage.js
+++ b/front/src/pages/ProfilePage.js
@@ -58,23 +58,23 @@ const ProfilePage = () => {
         const token = localStorage.getItem('token');
         if (!token) throw new Error('No token');
 
-        const res = await axios.get('http://localhost:8080/api/users/me', {
+        const res = await axios.get('https://star-isih.onrender.com/api/users/me', {
           headers: { Authorization: `Bearer ${token}` }
         });
 
         const userData = res.data.user;
         setUser(userData);
 
-        // ✅ 서버에서 전체 건물 목록 받아오기
-        const buildingsRes = await axios.get('http://localhost:8080/api/buildings');
+        // 서버에서 전체 건물 목록 받아오기
+        const buildingsRes = await axios.get('hhttps://star-isih.onrender.com/api/buildings');
         const buildingData = buildingsRes.data.buildings;
 
-        // ✅ building.name과 userData.favorites를 비교해 매칭
+        // building.name과 userData.favorites를 비교해 매칭
         const matched = await Promise.all(
           buildingData
             .filter(b => userData.favorites.includes(b.buildingName))
             .map(async (b) => {
-              const roomRes = await axios.get(`http://localhost:8080/api/buildings/rooms?buildingNo=${b.buildingNo}`);
+              const roomRes = await axios.get(`https://star-isih.onrender.com/api/buildings/rooms?buildingNo=${b.buildingNo}`);
               const availableRooms = roomRes.data.rooms || [];
         
               return {
@@ -123,13 +123,13 @@ const ProfilePage = () => {
 
       if (token) {
         if (isAlreadyFavorite) {
-          await axios.delete('http://localhost:8080/api/users/favorites', {
+          await axios.delete('https://star-isih.onrender.com/api/users/favorites', {
             headers: { Authorization: `Bearer ${token}` },
             data: { building: buildingName },
           });
           updatedFavorites = user.favorites.filter((n) => n !== buildingName);
         } else {
-          await axios.post('http://localhost:8080/api/users/favorites', { building: buildingName }, {
+          await axios.post('https://star-isih.onrender.com/api/users/favorites', { building: buildingName }, {
             headers: { Authorization: `Bearer ${token}` },
           });
           updatedFavorites = [...user.favorites, buildingName];
diff --git a/front/src/pages/ReservePage.js b/front/src/pages/ReservePage.js
index 8e1b002..57824a1 100644
--- a/front/src/pages/ReservePage.js
+++ b/front/src/pages/ReservePage.js
@@ -54,8 +54,8 @@ const ReservePage = () => {
       try {
         const token = localStorage.getItem('token');
         const [buildingsRes, userRes] = await Promise.all([
-          axios.get('http://localhost:8080/api/buildings'),
-          axios.get('http://localhost:8080/api/users/me', {
+          axios.get('https://star-isih.onrender.com/api/buildings'),
+          axios.get('https://star-isih.onrender.com/api/users/me', {
             headers: { Authorization: `Bearer ${token}` }
           }),
         ]);
@@ -65,7 +65,7 @@ const ReservePage = () => {
 
         const buildingList = await Promise.all(
           buildingData.map(async (b) => {
-            const roomRes = await axios.get(`http://localhost:8080/api/buildings/rooms?buildingNo=${b.buildingNo}`);
+            const roomRes = await axios.get(`https://star-isih.onrender.com/api/buildings/rooms?buildingNo=${b.buildingNo}`);
             const availableRooms = roomRes.data.rooms || [];
             return {
               id: String(b.buildingNo),
@@ -99,7 +99,7 @@ const ReservePage = () => {
 
     try {
       if (isAlreadyFavorite) {
-        await axios.delete('http://localhost:8080/api/users/favorites', {
+        await axios.delete('https://star-isih.onrender.com/api/users/favorites', {
           headers: { Authorization: `Bearer ${token}` },
           data: { building: buildingName },
         });
@@ -107,7 +107,7 @@ const ReservePage = () => {
         setFavoriteIds(updated);
         localStorage.setItem('favorites', JSON.stringify(updated));
       } else {
-        await axios.post('http://localhost:8080/api/users/favorites', { building: buildingName }, {
+        await axios.post('https://star-isih.onrender.com/api/users/favorites', { building: buildingName }, {
           headers: { Authorization: `Bearer ${token}` },
         });
         const updated = [...favoriteIds, buildingName];
diff --git a/front/src/pages/RoomDetailPage.js b/front/src/pages/RoomDetailPage.js
index 1b20629..7c8f184 100644
--- a/front/src/pages/RoomDetailPage.js
+++ b/front/src/pages/RoomDetailPage.js
@@ -84,7 +84,7 @@ const RoomDetailPage = () => {
 
   const fetchAvailability = async () => {
     try {
-      const res = await axios.get('http://localhost:8080/api/timetable/availability', {
+      const res = await axios.get('https://star-isih.onrender.com/api/timetable/availability', {
         params: { building, room, week: formatDate(startOfWeek) }
       });
       applyGridFromAvailability(res.data.availability);
@@ -149,7 +149,7 @@ const RoomDetailPage = () => {
 
     try {
       await axios.post(
-        'http://localhost:8080/api/reservations',
+        'https://star-isih.onrender.com/api/reservations',
         {
           building,
           room,
diff --git a/front/src/pages/SignupPage.js b/front/src/pages/SignupPage.js
index 2edef66..e22cf1d 100644
--- a/front/src/pages/SignupPage.js
+++ b/front/src/pages/SignupPage.js
@@ -35,7 +35,7 @@ const SignupPage = () => {
 
   const handleSignup = async () => {
     try {
-      await axios.post('http://localhost:8080/api/users/register', form);
+      await axios.post('https://star-isih.onrender.com/api/users/register', form);
       alert('회원가입 성공!');
       window.location.href = '/login';
     } catch (err) {