diff --git a/src/main/java/org/sopt/app/application/appjamuser/AppjamUserService.java b/src/main/java/org/sopt/app/application/appjamuser/AppjamUserService.java
index 6ab8f823..a599f546 100644
--- a/src/main/java/org/sopt/app/application/appjamuser/AppjamUserService.java
+++ b/src/main/java/org/sopt/app/application/appjamuser/AppjamUserService.java
@@ -29,9 +29,9 @@ public TeamSummary getTeamSummaryByTeamNumber(TeamNumber teamNumber) {
     }
 
     public TeamSummary getTeamSummaryByUserId(Long userId) {
-        val appjamUser = appjamUserRepository.findByUserId(userId)
-            .orElseThrow(() -> new NotFoundException(ErrorCode.TEAM_NOT_FOUND));
-        return TeamSummary.from(appjamUser);
+        return appjamUserRepository.findByUserId(userId)
+            .map(TeamSummary::from)
+            .orElseGet(TeamSummary::empty);
     }
 
     public boolean isAppjamParticipant(Long userId) {
diff --git a/src/main/java/org/sopt/app/application/mission/AppjamMissionService.java b/src/main/java/org/sopt/app/application/mission/AppjamMissionService.java
index 29f296ee..fdd3e2fb 100644
--- a/src/main/java/org/sopt/app/application/mission/AppjamMissionService.java
+++ b/src/main/java/org/sopt/app/application/mission/AppjamMissionService.java
@@ -19,6 +19,7 @@
 import org.sopt.app.interfaces.postgres.MissionRepository;
 import org.sopt.app.interfaces.postgres.SoptampUserRepository;
 import org.sopt.app.interfaces.postgres.StampRepository;
+import org.springframework.lang.Nullable;
 import org.springframework.stereotype.Service;
 
 @Service
@@ -30,14 +31,30 @@ public class AppjamMissionService {
     private final StampRepository stampRepository;
     private final SoptampUserRepository soptampUserRepository;
 
-    public List<AppjamMissionInfo> getDisplayedMissions() {
+    public List<AppjamMissionInfo> getMissions(
+        @Nullable TeamNumber teamNumber,
+        @Nullable Boolean isCompleted
+    ){
+        val missions = (teamNumber != null)
+            ? getMissionsByTeam(teamNumber)
+            : getDisplayedMissions();
+
+        if (isCompleted != null) {
+            return missions.stream()
+                .filter(mission -> Objects.equals(mission.isCompleted(), isCompleted))
+                .toList();
+        }
+        return missions;
+    }
+
+    private List<AppjamMissionInfo> getDisplayedMissions() {
         val displayedMissions = missionRepository.findAllByDisplay(true);
         return displayedMissions.stream()
             .map(AppjamMissionInfo::createWhenUncompleted)
             .toList();
     }
 
-    public List<AppjamMissionInfo> getMissionsByTeam(TeamNumber teamNumber) {
+    private List<AppjamMissionInfo> getMissionsByTeam(TeamNumber teamNumber) {
         val userIds = getTeamUserIds(teamNumber);
         val stampsByMissionId = getStampMapByUserIds(userIds);
         val soptampUserByUserId = getSoptampUserMapByUserIds(userIds);
@@ -48,15 +65,6 @@ public List<AppjamMissionInfo> getMissionsByTeam(TeamNumber teamNumber) {
             .toList();
     }
 
-    public List<AppjamMissionInfo> getMissionsByTeamAndCondition(TeamNumber teamNumber,
-        boolean isCompleted) {
-        List<AppjamMissionInfo> allMissions = getMissionsByTeam(teamNumber);
-
-        return allMissions.stream()
-            .filter(mission -> Objects.equals(mission.isCompleted(), isCompleted))
-            .toList();
-    }
-
     private AppjamMissionInfo toTeamMissionInfo(
         Mission mission,
         Map<Long, Stamp> stampByMissionId,
diff --git a/src/main/java/org/sopt/app/facade/MissionFacade.java b/src/main/java/org/sopt/app/facade/MissionFacade.java
index f5714848..aaa17679 100644
--- a/src/main/java/org/sopt/app/facade/MissionFacade.java
+++ b/src/main/java/org/sopt/app/facade/MissionFacade.java
@@ -2,7 +2,6 @@
 
 import lombok.RequiredArgsConstructor;
 import lombok.val;
-import org.sopt.app.application.appjamuser.AppjamUserInfo.AppjamUserStatus;
 import org.sopt.app.application.appjamuser.AppjamUserInfo.TeamSummary;
 import org.sopt.app.application.appjamuser.AppjamUserService;
 import org.sopt.app.application.mission.AppjamMissionService;
@@ -25,22 +24,18 @@ public AppjamMissionInfos getTeamMissions(
         @Nullable TeamNumber teamNumber,
         @Nullable Boolean complete
     ) {
-        if (teamNumber == null) {
-            val missions = appjamMissionService.getDisplayedMissions();
-            return AppjamMissionInfos.of(AppjamUserStatus.appjamNotJoined(), TeamSummary.empty(),
-                missions);
-        }
-
-        val teamSummary = appjamUserService.getTeamSummaryByTeamNumber(teamNumber);
+        val teamSummary = resolveTeamSummary(userId, teamNumber);
         val appjamUserStatus = appjamUserService.getAppjamUserStatus(userId);
-        if (complete != null) {
-            return AppjamMissionInfos.of(
-                appjamUserStatus,
-                teamSummary,
-                appjamMissionService.getMissionsByTeamAndCondition(teamNumber, complete));
-        }
+
         return AppjamMissionInfos.of(appjamUserStatus, teamSummary,
-            appjamMissionService.getMissionsByTeam(teamNumber));
+            appjamMissionService.getMissions(teamSummary.getTeamNumber(), complete));
+    }
+
+    private TeamSummary resolveTeamSummary(Long userId, TeamNumber teamNumber) {
+        if (teamNumber != null) {
+            return appjamUserService.getTeamSummaryByTeamNumber(teamNumber);
+        }
+        return appjamUserService.getTeamSummaryByUserId(userId);
     }
 
 }
diff --git a/src/main/java/org/sopt/app/presentation/user/UserController.java b/src/main/java/org/sopt/app/presentation/user/UserController.java
index 4cc19a95..8cf8543a 100755
--- a/src/main/java/org/sopt/app/presentation/user/UserController.java
+++ b/src/main/java/org/sopt/app/presentation/user/UserController.java
@@ -158,6 +158,7 @@ public ResponseEntity<UserResponse.MySoptLog> getMySoptLog(
         return ResponseEntity.ok(response);
     }
 
+    @Deprecated
     @Operation(summary = "앱잼 팀 정보 조회")
     @GetMapping("/appjam-info")
     public ResponseEntity<UserResponse.AppjamStatusResponse> getTeamInfo(