diff --git a/src/backend/auth-server/main.ts b/src/backend/auth-server/main.ts
index 0f24a06a..8cc5d839 100644
--- a/src/backend/auth-server/main.ts
+++ b/src/backend/auth-server/main.ts
@@ -137,6 +137,12 @@ app.register(fastifySwaggerUi, {
 app.register(currentAuthPlugin);
 app.register(routes);
 
+app.register(cors, {
+  origin: false,
+  credentials: true,
+  allowedHeaders: ['Content-Type', 'Authorization', 'Refresh-Token'],
+});
+
 app
   .register(fastifyRedis, {
     client: redis,
@@ -151,6 +157,13 @@ app
 
 app.register(fastifyCookie, {
   secret: SECRET_KEY,
+  hook: 'onRequest',
+  parseOptions: {
+    secure: true,
+    httpOnly: true,
+    sameSite: 'none',
+    path: '/',
+  },
 } as FastifyCookieOptions);
 
 app.setErrorHandler((err, req, reply) => {
diff --git a/src/backend/auth-server/src/controllers/auth/index.ts b/src/backend/auth-server/src/controllers/auth/index.ts
index 9cb461f1..7f7a474d 100644
--- a/src/backend/auth-server/src/controllers/auth/index.ts
+++ b/src/backend/auth-server/src/controllers/auth/index.ts
@@ -1,5 +1,5 @@
 import { FastifyRequest, FastifyReply } from 'fastify';
-import { generateHash } from '../../libs/authHelper';
+import { generateHash, shortVerifyRefreshToken } from '../../libs/authHelper';
 import { ERROR_MESSAGE, REDIS_KEY } from '../../libs/constants';
 import { SUCCESS_MESSAGE } from '../../libs/constants';
 import { handleError } from '../../libs/errorHelper';
@@ -23,16 +23,9 @@ function authController() {
         return;
       }
 
-      res.setCookie('refresh_token', values.refreshToken, {
-        sameSite: true,
-        httpOnly: true,
-        secure: true,
-        path: '/',
-        expires: new Date(Date.now() + 1000 * 60 * 60 * 24 * 7),
-      });
-
       const result = {
         accessToken: values.accessToken,
+        refreshToken: values.refreshToken,
       };
 
       await redis.set(REDIS_KEY.refreshToken(values.id), values.refreshToken);
@@ -67,33 +60,6 @@ function authController() {
     }
   };
 
-  const mobileLogin = async (req: FastifyRequest, res: FastifyReply) => {
-    const { email, password } = req.body as { email: string; password: string };
-
-    const values = await authService.loginWithPassword(email, password);
-
-    if (!values) {
-      handleError(res, ERROR_MESSAGE.notFound);
-      return;
-    }
-
-    const result = {
-      accessToken: values.accessToken,
-      refreshToken: values.refreshToken,
-    };
-
-    await redis.set(REDIS_KEY.refreshToken(values.id), values.refreshToken);
-
-    handleSuccess(
-      res,
-      {
-        ...SUCCESS_MESSAGE.loginOk,
-        result,
-      },
-      200,
-    );
-  };
-
   const register = async (
     req: FastifyRequest<{
       Body: { email: string; password: string; name: string; nickname: string; birthdate: string };
@@ -128,20 +94,15 @@ function authController() {
 
   const logout = async (req: FastifyRequest, res: FastifyReply) => {
     const id = req.user?.id;
-    const refreshToken = req.cookies.refresh_token;
+    const refreshToken = req.headers['refresh-token'] as string;
 
-    if (!id || !refreshToken) {
+    if (!id || !refreshToken || refreshToken === 'null' || refreshToken === '') {
       handleError(res, ERROR_MESSAGE.unauthorized);
       return;
     }
 
     try {
       await redis.del(REDIS_KEY.refreshToken(id));
-
-      res.clearCookie('refresh_token', {
-        path: '/',
-      });
-
       handleSuccess(res, SUCCESS_MESSAGE.logoutOk, 205);
     } catch (error) {
       handleError(res, ERROR_MESSAGE.badRequest, error);
@@ -150,7 +111,7 @@ function authController() {
 
   const refresh = async (req: FastifyRequest, res: FastifyReply) => {
     const id = req.user?.id;
-    const refreshToken = req.cookies.refresh_token;
+    const refreshToken = req.headers['refresh-token'] as string;
 
     if (!refreshToken || !id) {
       handleError(res, ERROR_MESSAGE.unauthorized);
@@ -167,20 +128,13 @@ function authController() {
 
       const result = await authService.refresh(refreshToken, redisRefreshToken);
 
-      res.setCookie('refresh_token', result.refreshToken, {
-        sameSite: 'lax',
-        httpOnly: true,
-        secure: false,
-        path: '/',
-        expires: new Date(Date.now() + 1000 * 60 * 60 * 24 * 7),
-      });
-
       await redis.set(REDIS_KEY.refreshToken(id), result.refreshToken);
 
       handleSuccess(res, {
         ...SUCCESS_MESSAGE.refreshToken,
         result: {
           accessToken: result.accessToken,
+          refreshToken: result.refreshToken,
         },
       });
     } catch (error) {
@@ -188,44 +142,6 @@ function authController() {
     }
   };
 
-  const refreshMobile = async (req: FastifyRequest, res: FastifyReply) => {
-    const id = req.user?.id;
-    const refreshToken = req.cookies.refresh_token;
-
-    if (!refreshToken || !id) {
-      handleError(res, ERROR_MESSAGE.unauthorized);
-      return;
-    }
-
-    try {
-      const redisRefreshToken = await redis.get(REDIS_KEY.refreshToken(id));
-
-      if (!redisRefreshToken) {
-        handleError(res, ERROR_MESSAGE.unauthorized);
-        return;
-      }
-
-      const result = await authService.refresh(refreshToken, redisRefreshToken);
-
-      res.setCookie('refresh_token', result.refreshToken, {
-        sameSite: 'lax',
-        httpOnly: true,
-        secure: false,
-        path: '/',
-        expires: new Date(Date.now() + 1000 * 60 * 60 * 24 * 7),
-      });
-
-      await redis.set(REDIS_KEY.refreshToken(id), result.refreshToken);
-
-      handleSuccess(res, {
-        ...SUCCESS_MESSAGE.refreshToken,
-        result,
-      });
-    } catch (error) {
-      handleError(res, ERROR_MESSAGE.unauthorized, error);
-    }
-  };
-
   const verifyToken = async (req: FastifyRequest, res: FastifyReply) => {
     const accessToken = req.headers.authorization;
     if (!accessToken) {
@@ -254,15 +170,20 @@ function authController() {
   };
 
   const loginStatusCheck = async (req: FastifyRequest, res: FastifyReply) => {
-    const id = req.user?.id;
-    const refreshToken = req.cookies.refresh_token;
+    const refreshToken = req.headers['refresh-token'] as string;
 
-    if (!id || !refreshToken) {
+    if (!refreshToken || refreshToken === 'null' || refreshToken === '') {
       handleSuccess(res, SUCCESS_MESSAGE.loginStatusDisabled, 200);
       return;
     }
 
-    handleSuccess(res, SUCCESS_MESSAGE.loginStatusOK, 200);
+    try {
+      shortVerifyRefreshToken(refreshToken);
+      handleSuccess(res, SUCCESS_MESSAGE.loginStatusOK, 200);
+    } catch (error) {
+      handleSuccess(res, SUCCESS_MESSAGE.loginStatusDisabled, 200);
+      return;
+    }
   };
 
   return {
@@ -272,8 +193,6 @@ function authController() {
     refresh,
     verifyToken,
     healthCheck,
-    mobileLogin,
-    refreshMobile,
     loginStatusCheck,
   };
 }
diff --git a/src/backend/auth-server/src/routes/auth/index.ts b/src/backend/auth-server/src/routes/auth/index.ts
index c385703a..8a3880f1 100644
--- a/src/backend/auth-server/src/routes/auth/index.ts
+++ b/src/backend/auth-server/src/routes/auth/index.ts
@@ -3,8 +3,6 @@ import { ZodTypeProvider } from 'fastify-type-provider-zod';
 import {
   healthCheckSchema,
   logoutSchema,
-  mobileSignInSchema,
-  refreshTokenMobileSchema,
   refreshTokenSchema,
   registerSchema,
   signInSchema,
@@ -18,6 +16,7 @@ const authRoute = async (app: FastifyInstance) => {
   app.withTypeProvider<ZodTypeProvider>().route({
     method: 'GET',
     url: '/status-check',
+    preHandler: [verifySignIn],
     schema: loginStatusCheckSchema,
     handler: authController.loginStatusCheck,
   });
@@ -29,13 +28,6 @@ const authRoute = async (app: FastifyInstance) => {
     handler: authController.login,
   });
 
-  app.withTypeProvider<ZodTypeProvider>().route({
-    method: 'POST',
-    url: '/mobile-login',
-    schema: mobileSignInSchema,
-    handler: authController.mobileLogin,
-  });
-
   app.withTypeProvider<ZodTypeProvider>().route({
     method: 'POST',
     url: '/register',
@@ -59,13 +51,6 @@ const authRoute = async (app: FastifyInstance) => {
     handler: authController.refresh,
   });
 
-  app.withTypeProvider<ZodTypeProvider>().route({
-    method: 'POST',
-    url: '/refresh-mobile',
-    schema: refreshTokenMobileSchema,
-    handler: authController.refreshMobile,
-  });
-
   app.withTypeProvider<ZodTypeProvider>().route({
     method: 'GET',
     url: '/verify-token',
diff --git a/src/backend/auth-server/src/schema/authSchema.ts b/src/backend/auth-server/src/schema/authSchema.ts
index ed3ae8cc..0cb3a713 100644
--- a/src/backend/auth-server/src/schema/authSchema.ts
+++ b/src/backend/auth-server/src/schema/authSchema.ts
@@ -8,25 +8,6 @@ const signInSchema = {
     email: z.string().email(),
     password: z.string(),
   }),
-  response: {
-    200: z.object({
-      code: z.string().default('AUTH100'),
-      message: z.string().default('Login Ok!'),
-      result: z.object({
-        accessToken: z.string(),
-      }),
-    }),
-    400: commonResponseSchemaOmitResult,
-  },
-};
-
-const mobileSignInSchema = {
-  tags: ['auth'],
-  description: '모바일 로그인 합니다.',
-  body: z.object({
-    email: z.string().email(),
-    password: z.string(),
-  }),
   response: {
     200: z.object({
       code: z.string().default('AUTH100'),
@@ -81,27 +62,9 @@ const registerSchema = {
 
 const refreshTokenSchema = {
   tags: ['auth'],
-  security: [{ bearerAuth: [] }],
-  response: {
-    201: z.object({
-      code: z.string().default('AUTH102'),
-      message: z.string().default('refresh success'),
-      result: z.object({
-        accessToken: z.string(),
-      }),
-    }),
-    400: commonResponseSchemaOmitResult,
-  },
-  description: `
-  리프레시 토큰은 쿠키('refresh_token')로 자동 처리됩니다.
-  Swagger UI에서 테스트하려면 브라우저 쿠키가 있어야 합니다.
-  1. 먼저 로그인하여 쿠키 설정
-  2. 이 엔드포인트 호출하여 새 액세스 토큰 발급
-`,
-};
-
-const refreshTokenMobileSchema = {
-  tags: ['auth'],
+  headers: z.object({
+    'refresh-token': z.string(),
+  }),
   security: [{ bearerAuth: [] }],
   response: {
     201: z.object({
@@ -125,6 +88,9 @@ const refreshTokenMobileSchema = {
 const logoutSchema = {
   tags: ['auth'],
   description: '로그아웃 합니다.',
+  headers: z.object({
+    'refresh-token': z.string(),
+  }),
   security: [{ bearerAuth: [] }],
   response: {
     205: z.object({
@@ -195,10 +161,14 @@ const healthCheckSchema = {
 const loginStatusCheckSchema = {
   tags: ['auth'],
   description: '로그인 상태를 확인 합니다.',
+  security: [{ bearerAuth: [] }],
   response: {
     200: z.object({
       code: z.string().default('AUTH109'),
       message: z.string().default('login status check success!'),
+      result: z.object({
+        status: z.boolean(),
+      }),
     }),
     401: commonResponseSchema,
   },
@@ -207,11 +177,9 @@ const loginStatusCheckSchema = {
 export {
   logoutSchema,
   refreshTokenSchema,
-  refreshTokenMobileSchema,
   verifyTokenSchema,
   registerSchema,
   signInSchema,
-  mobileSignInSchema,
   verifyEmailSchema,
   tokenDecodeSchema,
   healthCheckSchema,