diff --git a/src/main/java/com/example/triptalk/domain/tripPlan/controller/TripPlanController.java b/src/main/java/com/example/triptalk/domain/tripPlan/controller/TripPlanController.java
index f535241..e8f09cc 100644
--- a/src/main/java/com/example/triptalk/domain/tripPlan/controller/TripPlanController.java
+++ b/src/main/java/com/example/triptalk/domain/tripPlan/controller/TripPlanController.java
@@ -4,9 +4,11 @@
 import com.example.triptalk.domain.tripPlan.enums.TripStatus;
 import com.example.triptalk.domain.tripPlan.service.TripPlanService;
 import com.example.triptalk.global.apiPayload.ApiResponse;
+import com.example.triptalk.global.security.AuthUtil;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.servlet.http.HttpServletRequest;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.*;
 
@@ -17,15 +19,17 @@
 public class TripPlanController {
 
     private final TripPlanService tripPlanService;
+    private final AuthUtil authUtil;
 
     @GetMapping("/{tripPlanId}")
     @Operation(summary = "여행 일정 조회", description = "tripPlanId로 여행 일정을 조회합니다.")
     public ApiResponse<TripPlanResponse.TripPlanDTO> getTripPlan(
             @Parameter(description = "tripPlan ID", example = "1", required = true)
-            @PathVariable Long tripPlanId
+            @PathVariable Long tripPlanId,
+            HttpServletRequest request
     ) {
-        // 인증 구현 후 SecurityContext에서 로그인한 userId 가져오기
-        TripPlanResponse.TripPlanDTO response = tripPlanService.getTripPlan(tripPlanId, 1L);
+        Long userId = authUtil.getUserIdFromRequest(request);
+        TripPlanResponse.TripPlanDTO response = tripPlanService.getTripPlan(tripPlanId, userId);
         return ApiResponse.onSuccess(response);
     }
 
@@ -35,10 +39,11 @@ public ApiResponse<TripPlanResponse.TripPlanListResultDTO> getMyTripPlans(
             @Parameter(description = "여행 상태 필터", example = "PLANNED", required = true)
             @RequestParam TripStatus status,
             @Parameter(description = "다음 커서 ID (처음 요청 시 null)", example = "null")
-            @RequestParam(required = false) Long cursorId
+            @RequestParam(required = false) Long cursorId,
+            HttpServletRequest request
     ) {
-        // 인증 구현 후 SecurityContext에서 로그인한 userId 가져오기
-        TripPlanResponse.TripPlanListResultDTO response = tripPlanService.getMyTripPlans(1L, status, cursorId);
+        Long userId = authUtil.getUserIdFromRequest(request);
+        TripPlanResponse.TripPlanListResultDTO response = tripPlanService.getMyTripPlans(userId, status, cursorId);
         return ApiResponse.onSuccess(response);
     }
 
@@ -46,10 +51,11 @@ public ApiResponse<TripPlanResponse.TripPlanListResultDTO> getMyTripPlans(
     @Operation(summary = "여행 상태 완료 처리", description = "여행 계획의 상태를 PLANNED에서 TRAVELED로 변경합니다.")
     public ApiResponse<TripPlanResponse.TripPlanStatusDTO> markTripPlanAsTraveled(
             @Parameter(description = "tripPlan ID", example = "1", required = true)
-            @PathVariable Long tripPlanId
+            @PathVariable Long tripPlanId,
+            HttpServletRequest request
     ) {
-        // 인증 구현 후 SecurityContext에서 로그인한 userId 가져오기
-        TripPlanResponse.TripPlanStatusDTO response = tripPlanService.changeTripPlanStatusToTraveled(tripPlanId, 1L);
+        Long userId = authUtil.getUserIdFromRequest(request);
+        TripPlanResponse.TripPlanStatusDTO response = tripPlanService.changeTripPlanStatusToTraveled(tripPlanId, userId);
         return ApiResponse.onSuccess(response);
     }
 }
diff --git a/src/main/java/com/example/triptalk/domain/user/controller/UserController.java b/src/main/java/com/example/triptalk/domain/user/controller/UserController.java
index 4d16ff3..a4e9da9 100644
--- a/src/main/java/com/example/triptalk/domain/user/controller/UserController.java
+++ b/src/main/java/com/example/triptalk/domain/user/controller/UserController.java
@@ -3,9 +3,10 @@
 import com.example.triptalk.domain.user.dto.UserResponse;
 import com.example.triptalk.domain.user.service.UserService;
 import com.example.triptalk.global.apiPayload.ApiResponse;
+import com.example.triptalk.global.security.AuthUtil;
 import io.swagger.v3.oas.annotations.Operation;
-import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.servlet.http.HttpServletRequest;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.*;
 
@@ -16,15 +17,13 @@
 public class UserController {
 
     private final UserService userService;
+    private final AuthUtil authUtil;
 
-    @GetMapping("/{userId}")
+    @GetMapping("/me")
     @Operation(summary = "마이페이지 유저 정보 조회 API", description = "현재 로그인한 사용자의 마이페이지 정보를 조회하는 API입니다.")
-    public ApiResponse<UserResponse.UserInfoDTO> getUserInfo(
-            @Parameter(description = "유저 ID", required = true, example = "1")
-            @PathVariable Long userId
-    ) {
-        // 임시 유저로 설정
-        UserResponse.UserInfoDTO response = userService.getUserInfo(1L);
+    public ApiResponse<UserResponse.UserInfoDTO> getUserInfo(HttpServletRequest request) {
+        Long userId = authUtil.getUserIdFromRequest(request);
+        UserResponse.UserInfoDTO response = userService.getUserInfo(userId);
         return ApiResponse.onSuccess(response);
     }
 }
diff --git a/src/main/java/com/example/triptalk/global/security/AuthUtil.java b/src/main/java/com/example/triptalk/global/security/AuthUtil.java
new file mode 100644
index 0000000..b44cd31
--- /dev/null
+++ b/src/main/java/com/example/triptalk/global/security/AuthUtil.java
@@ -0,0 +1,51 @@
+package com.example.triptalk.global.security;
+
+import com.example.triptalk.domain.user.entity.User;
+import com.example.triptalk.domain.user.repository.UserRepository;
+import com.example.triptalk.global.apiPayload.code.status.ErrorStatus;
+import com.example.triptalk.global.apiPayload.exception.handler.ErrorHandler;
+import com.example.triptalk.global.security.jwt.JwtTokenProvider;
+import jakarta.servlet.http.HttpServletRequest;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+import org.springframework.util.StringUtils;
+
+@Component
+@RequiredArgsConstructor
+public class AuthUtil {
+
+    private final JwtTokenProvider jwtTokenProvider;
+    private final UserRepository userRepository;
+
+    /**
+     * HTTP 요청에서 JWT 토큰을 추출하여 사용자 ID를 반환
+     * @param request HTTP 요청
+     * @return 사용자 ID
+     */
+    public Long getUserIdFromRequest(HttpServletRequest request) {
+        String token = resolveToken(request);
+        if (token == null || !jwtTokenProvider.validateToken(token)) {
+            throw new ErrorHandler(ErrorStatus._UNAUTHORIZED);
+        }
+
+        String email = jwtTokenProvider.getEmailFromToken(token);
+        User user = userRepository.findByEmail(email)
+                .orElseThrow(() -> new ErrorHandler(ErrorStatus.USER_NOT_FOUND));
+
+        return user.getId();
+    }
+
+    /**
+     * HTTP 요청 헤더에서 JWT 토큰 추출
+     * @param request HTTP 요청
+     * @return JWT 토큰 (없으면 null)
+     */
+    private String resolveToken(HttpServletRequest request) {
+        String bearerToken = request.getHeader("Authorization");
+        if (StringUtils.hasText(bearerToken) && bearerToken.startsWith("Bearer ")) {
+            return bearerToken.substring(7);
+        }
+        return null;
+    }
+}
+