diff --git a/backend/src/main/java/com/example/backend/analysis/controller/CaseStatsController.java b/backend/src/main/java/com/example/backend/analysis/controller/CaseStatsController.java
index 267c41d2..37907300 100644
--- a/backend/src/main/java/com/example/backend/analysis/controller/CaseStatsController.java
+++ b/backend/src/main/java/com/example/backend/analysis/controller/CaseStatsController.java
@@ -109,18 +109,8 @@ public ResponseEntity<?> getLocationCaseStats(@RequestParam("period") String per
 
     // 지도용 장소별 사건 수 조회
     @GetMapping("/map")
-    public ResponseEntity<?> getMapCaseStats(@RequestParam("period") String period, HttpSession session) {
-        try {
-            List<MapCaseStatsResponse> stats = caseStatsService.getMapCaseStats(period, session);
-            return ResponseEntity.ok(stats);
-        } catch (IllegalStateException e) {
-            return ResponseEntity.status(401).body(Collections.singletonMap("message", e.getMessage()));
-        } catch (IllegalArgumentException e) {
-            return ResponseEntity.status(400).body(Collections.singletonMap("message", e.getMessage()));
-        } catch (NoSuchElementException e) {
-            return ResponseEntity.status(404).body(Collections.singletonMap("message", e.getMessage()));
-        } catch (Exception e) {
-            return ResponseEntity.status(500).body(Collections.singletonMap("message", "내부 서버 오류가 발생했습니다."));
-        }
+    public ResponseEntity<?> getMapCaseStats(HttpSession session) {
+        List<MapCaseStatsResponse> stats = caseStatsService.getMapCaseStats(session);
+        return ResponseEntity.ok(stats);
     }
 }
diff --git a/backend/src/main/java/com/example/backend/analysis/service/CaseStatsService.java b/backend/src/main/java/com/example/backend/analysis/service/CaseStatsService.java
index 4d08930f..86366f83 100644
--- a/backend/src/main/java/com/example/backend/analysis/service/CaseStatsService.java
+++ b/backend/src/main/java/com/example/backend/analysis/service/CaseStatsService.java
@@ -224,10 +224,10 @@ public List<LocationCaseStatsResponse> getLocationCaseStats(String period, HttpS
     }
 
     // 지도용 장소별 사건 수 조회 (startDate를 계산해 전달)
-    public List<MapCaseStatsResponse> getMapCaseStats(String period, HttpSession session) {
+    public List<MapCaseStatsResponse> getMapCaseStats(HttpSession session) {
         int officeId = getOfficeId(session);
 
-        LocalDateTime startDate = getStartDateFromPeriod(period);
+        LocalDateTime startDate = getStartDateFromPeriod("monthly");
         List<Object[]> results = statsCategoryRepository.findMapCaseStats(startDate);
 
         if (results.isEmpty()) {