diff --git a/src/main/java/com/example/gtable/global/security/oauth2/OAuth2LoginSuccessHandler.java b/src/main/java/com/example/gtable/global/security/oauth2/OAuth2LoginSuccessHandler.java
index 60ce2a6..fdbe236 100644
--- a/src/main/java/com/example/gtable/global/security/oauth2/OAuth2LoginSuccessHandler.java
+++ b/src/main/java/com/example/gtable/global/security/oauth2/OAuth2LoginSuccessHandler.java
@@ -19,6 +19,7 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 
 import jakarta.servlet.ServletException;
+import jakarta.servlet.http.Cookie;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
 import lombok.RequiredArgsConstructor;
@@ -28,7 +29,6 @@
 // 1. JWT 토큰 발급
 // - 이때, JWT payload는 보안상 최소한의 정보(userId, role)만 담겠다
 // 2. refreshToken만 DB에 저장
-// 3. JSON 응답으로, accessToken과 refreshToken 을 반환해준다.
 @Component
 @RequiredArgsConstructor
 @Slf4j
@@ -40,42 +40,32 @@ public class OAuth2LoginSuccessHandler extends SimpleUrlAuthenticationSuccessHan
 	public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response,
 		Authentication authentication) throws IOException {
 
-		// 1. CustomOAuth2UserService에서 설정한 OAuth2User 정보 가져오기
-		CustomOAuth2User customUserDetails = (CustomOAuth2User)authentication.getPrincipal();
-
+		CustomOAuth2User customUserDetails = (CustomOAuth2User) authentication.getPrincipal();
 		User user = customUserDetails.getUser();
 		Long userId = customUserDetails.getUserId();
-		String email = customUserDetails.getName();
-
-		Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();
-		Iterator<? extends GrantedAuthority> iterator = authorities.iterator();
-		GrantedAuthority auth = iterator.next();
-
-		String role = auth.getAuthority();
+		String role = authentication.getAuthorities().iterator().next().getAuthority();
 
-		log.info("user, userId, email, role :: {} {} {} {}", user, userId, email, role);
+		// JWT 발급
+		String accessToken = jwtUtil.createAccessToken("accessToken", userId, role, 30 * 60 * 1000L); // 30분
+		String refreshToken = jwtUtil.createRefreshToken("refreshToken", userId, 30L * 24 * 60 * 60 * 1000L); // 30일
 
-		// 2. 1)의 사용자 정보를 담아, accessToken과 refreshToken 발행
-		String accessToken = jwtUtil.createAccessToken("accessToken", userId, role, 30 * 60 * 1000L);  // 유효기간 30분
-		String refreshToken = jwtUtil.createRefreshToken("refreshToken", userId,
-			30 * 24 * 60 * 60 * 1000L);    // 유효기간 30일
-
-		// 3. refreshToken을 DB에 저장
+		// 1. refreshToken을 DB에 저장
 		Token refreshTokenEntity = Token.toEntity(user, refreshToken, LocalDateTime.now().plusDays(30));
 		tokenRepository.save(refreshTokenEntity);
 
-		// 4. JSON 응답으로, accessToken과 refreshToken 을 반환해준다.
-		response.setContentType("application/json");
-		response.setCharacterEncoding("utf-8");
+		// 2. refreshToken을 HttpOnly 쿠키로 설정
+		Cookie refreshTokenCookie = new Cookie("refreshToken", refreshToken);
+		refreshTokenCookie.setHttpOnly(true); // JS 접근 불가
+		refreshTokenCookie.setSecure(false); // 운영환경 https라면 true로 변경 필요
+		refreshTokenCookie.setPath("/");
+		refreshTokenCookie.setMaxAge(30 * 24 * 60 * 60); // 30일
+		response.addCookie(refreshTokenCookie);
+		response.addHeader("Set-Cookie", response.getHeader("Set-Cookie") + "; SameSite=Lax");
+
 
-		ObjectMapper objectMapper = new ObjectMapper(); // 객체 -> json 문자열로 변환
-		String body = objectMapper.writeValueAsString(
-			Map.of(
-				"accessToken", accessToken,
-				"refreshToken", refreshToken
-			)
-		);
-		response.getWriter().write(body);
+		// 3. 프론트엔드로 리다이렉트 (accessToken만 쿼리로 전달)
+		String targetUrl = "http://localhost:5173/login/success?accessToken=" + accessToken;
+		response.sendRedirect(targetUrl);
 	}
 
 }