diff --git a/src/main/java/org/tenten/tentenstomp/domain/trip/controller/TripController.java b/src/main/java/org/tenten/tentenstomp/domain/trip/controller/TripController.java
index 860088a..b202e56 100644
--- a/src/main/java/org/tenten/tentenstomp/domain/trip/controller/TripController.java
+++ b/src/main/java/org/tenten/tentenstomp/domain/trip/controller/TripController.java
@@ -13,8 +13,6 @@
 import org.tenten.tentenstomp.domain.trip.dto.request.*;
 import org.tenten.tentenstomp.domain.trip.dto.response.TripItemAddResponse;
 import org.tenten.tentenstomp.domain.trip.service.TripService;
-import org.tenten.tentenstomp.global.common.constant.ResponseConstant;
-import org.tenten.tentenstomp.global.response.GlobalDataResponse;
 
 @RestController
 @RequiredArgsConstructor
@@ -24,10 +22,10 @@ public class TripController {
     private final TripService tripService;
 
     @PostMapping("/trips/{tripId}")
-    public ResponseEntity<GlobalDataResponse<TripItemAddResponse>> addTripItemFromMainPage(
+    public ResponseEntity<TripItemAddResponse> addTripItemFromMainPage(
         @PathVariable Long tripId,
         @RequestBody TripItemAddRequest tripItemAddRequest) {
-        return ResponseEntity.ok(GlobalDataResponse.ok(ResponseConstant.SUCCESS, tripService.addTripItemFromMainPage(tripId, tripItemAddRequest)));
+        return ResponseEntity.ok(tripService.addTripItemFromMainPage(tripId, tripItemAddRequest));
     }
 
     @MessageMapping("/trips/{tripId}/connectMember")
diff --git a/src/main/java/org/tenten/tentenstomp/domain/trip/service/TripItemService.java b/src/main/java/org/tenten/tentenstomp/domain/trip/service/TripItemService.java
index 14c3548..b903710 100644
--- a/src/main/java/org/tenten/tentenstomp/domain/trip/service/TripItemService.java
+++ b/src/main/java/org/tenten/tentenstomp/domain/trip/service/TripItemService.java
@@ -21,7 +21,10 @@
 import org.tenten.tentenstomp.global.messaging.kafka.producer.KafkaProducer;
 
 import java.time.LocalDate;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
 
 import static org.tenten.tentenstomp.global.common.enums.Transportation.CAR;
 
@@ -49,9 +52,6 @@ public void updateTripItemPrice(String tripItemId, TripItemPriceUpdateMsg priceU
             Long newPrice = priceUpdateMsg.price();
             Trip trip = tripItem.getTrip();
             Map<String, Transportation> tripTransportationMap = trip.getTripTransportationMap();
-            if (tripTransportationMap == null) {
-                tripTransportationMap = new HashMap<>();
-            }
             Transportation transportation = tripTransportationMap.getOrDefault(priceUpdateMsg.visitDate(), CAR);
             trip.updateTripItemPriceSum(oldPrice, newPrice);
             tripItem.updatePrice(newPrice);
@@ -83,9 +83,6 @@ public void updateTripItemVisitDate(String tripItemId, TripItemVisitDateUpdateMs
             TripItem tripItem = optionalTripItem.get();
             Trip trip = tripRepository.getReferenceById(tripItem.getTrip().getId());
             Map<String, Transportation> tripTransportationMap = trip.getTripTransportationMap();
-            if (tripTransportationMap == null) {
-                tripTransportationMap = new HashMap<>();
-            }
             LocalDate pastDate = tripItem.getVisitDate();
             Transportation pastDateTransportation = tripTransportationMap.getOrDefault(pastDate.toString(), CAR);
             LocalDate newDate = LocalDate.parse(visitDateUpdateMsg.newVisitDate());
@@ -115,9 +112,6 @@ public void updateTripItemVisitDate(String tripItemId, TripItemVisitDateUpdateMs
             TripPathCalculationResult newDateTripPath = pathComponent.getTripPath(TripPlace.fromTripItems(newDateTripItems), newDateTransportation);
 
             Map<String, Integer> tripPathPriceMap = trip.getTripPathPriceMap();
-            if (tripPathPriceMap == null) {
-                tripPathPriceMap = new HashMap<>();
-            }
             trip.updateTransportationPriceSum(tripPathPriceMap.getOrDefault(pastDate.toString(), 0), pastDateTripPath.pathPriceSum());
             trip.updateTransportationPriceSum(tripPathPriceMap.getOrDefault(newDate.toString(), 0), newDateTripPath.pathPriceSum());
             tripPathPriceMap.put(pastDate.toString(), pastDateTripPath.pathPriceSum());
@@ -151,9 +145,6 @@ public void deleteTripItem(String tripItemId, TripItemDeleteMsg tripItemDeleteMs
             TripItem tripItem = optionalTripItem.get();
             Trip trip = tripRepository.getReferenceById(tripItem.getTrip().getId());
             Map<String, Transportation> tripTransportationMap = trip.getTripTransportationMap();
-            if (tripTransportationMap == null) {
-                tripTransportationMap = new HashMap<>();
-            }
             LocalDate visitDate = tripItem.getVisitDate();
             Transportation transportation = tripTransportationMap.getOrDefault(visitDate.toString(), CAR);
 
@@ -173,9 +164,6 @@ public void deleteTripItem(String tripItemId, TripItemDeleteMsg tripItemDeleteMs
             tripItemRepository.delete(tripItem);
             TripPathCalculationResult tripPath = pathComponent.getTripPath(TripPlace.fromTripItems(newTripItems), transportation);
             Map<String, Integer> tripPathPriceMap = trip.getTripPathPriceMap();
-            if (tripPathPriceMap == null) {
-                tripPathPriceMap = new HashMap<>();
-            }
             trip.updateTransportationPriceSum(tripPathPriceMap.getOrDefault(visitDate.toString(), 0), tripPath.pathPriceSum());
             tripPathPriceMap.put(visitDate.toString(), tripPath.pathPriceSum());
             trip.updateTripTransportationMap(tripTransportationMap);
diff --git a/src/main/java/org/tenten/tentenstomp/domain/trip/service/TripService.java b/src/main/java/org/tenten/tentenstomp/domain/trip/service/TripService.java
index 67a2273..3456e1a 100644
--- a/src/main/java/org/tenten/tentenstomp/domain/trip/service/TripService.java
+++ b/src/main/java/org/tenten/tentenstomp/domain/trip/service/TripService.java
@@ -139,15 +139,9 @@ public void addTripItem(String tripId, TripItemAddMsg tripItemAddMsg) {
 
     private void updateBudgetAndItemsAndPath(Trip trip, List<TripItem> tripItems, String visitDate) {
         Map<String, Transportation> tripTransportationMap = trip.getTripTransportationMap();
-        if (tripTransportationMap == null) {
-            tripTransportationMap = new HashMap<>();
-        }
         Transportation transportation = tripTransportationMap.getOrDefault(visitDate, CAR);
         TripPathCalculationResult tripPath = pathComponent.getTripPath(TripPlace.fromTripItems(tripItems), transportation);
         Map<String, Integer> tripPathPriceMap = trip.getTripPathPriceMap();
-        if (tripPathPriceMap == null) {
-            tripPathPriceMap = new HashMap<>();
-        }
         trip.updateTransportationPriceSum(tripPathPriceMap.getOrDefault(visitDate, 0), tripPath.pathPriceSum());
         tripPathPriceMap.put(visitDate, tripPath.pathPriceSum());
         trip.updateTripPathPriceMap(tripPathPriceMap);
@@ -207,17 +201,11 @@ public void updateTripBudget(String tripId, TripBudgetUpdateMsg tripBudgetUpdate
     public void updateTripTransportation(String tripId, TripTransportationUpdateMsg tripTransportationUpdateMsg) {
         Trip trip = tripRepository.findTripForUpdate(Long.parseLong(tripId)).orElseThrow(() -> new GlobalException("해당 아이디로 존재하는 여정이 없습니다 " + tripId, NOT_FOUND));
         Map<String, Transportation> tripTransportationMap = trip.getTripTransportationMap();
-        if (tripTransportationMap == null) {
-            tripTransportationMap = new HashMap<>();
-        }
         String visitDate = tripTransportationUpdateMsg.visitDate();
         List<TripItem> tripItems = tripItemRepository.findTripItemByTripIdAndVisitDate(trip.getId(), LocalDate.parse(visitDate));
 
         TripPathCalculationResult tripPath = pathComponent.getTripPath(TripPlace.fromTripItems(tripItems), tripTransportationUpdateMsg.transportation());
         Map<String, Integer> tripPathPriceMap = trip.getTripPathPriceMap();
-        if (tripPathPriceMap == null) {
-            tripPathPriceMap = new HashMap<>();
-        }
         trip.updateTransportationPriceSum(tripPathPriceMap.getOrDefault(visitDate, 0), tripPath.pathPriceSum());
 
         tripTransportationMap.put(visitDate, tripTransportationUpdateMsg.transportation());