diff --git a/docs/lottecinema-network-analysis-result.md b/docs/lottecinema-network-analysis-result.md
index bd91ef66..4e7107ac 100644
--- a/docs/lottecinema-network-analysis-result.md
+++ b/docs/lottecinema-network-analysis-result.md
@@ -20,7 +20,8 @@
   - `GetPlaySequence`에서 날짜/극장/영화 조합별 회차 실데이터 확보
 - 남은 좌석 수 조회: `가능`
   - `GetPlaySequence`의 `TotalSeatCount`, `BookingSeatCount`로 계산 가능
-  - 실측 기준 `remainingSeats = TotalSeatCount - BookingSeatCount`
+  - 실측 기준 `remainingSeats = BookingSeatCount`
+  - `bookedSeats = TotalSeatCount - BookingSeatCount`
 - 좌석 맵 상세 조회: `조건부 가능`
   - `GetSeats`로 좌석 맵은 조회되나, `BookingSeats`/`ScreenSeatInfo.BookingCount`와
     `GetPlaySequence.BookingSeatCount`의 의미 차이가 있어
@@ -218,21 +219,25 @@
   - `EndTime=12:47`
   - `ScreenNameKR=1관 샤롯데`
   - `TotalSeatCount=32`
-  - `BookingSeatCount=28`
-  - `남은 좌석수 = 4`
+  - `BookingSeatCount=28` (예매 가능/잔여 좌석)
+  - `남은 좌석수 = 28`
+  - `예매 좌석수 = 4`
 
 #### 잔여 좌석 계산식
 
 ```text
-remainingSeats = TotalSeatCount - BookingSeatCount
+remainingSeats = BookingSeatCount
+bookedSeats = TotalSeatCount - BookingSeatCount
 ```
 
+`BookingSeatCount` 필드명은 예매된 수처럼 보이지만, 공식 예매 화면과 `GetSeats` 점유 좌석 수와 대조하면 **예매 가능 좌석 수**다.
+
 #### 실측 회차 예시
 
-- `10:40-12:47`, 총 32석, 예매 28석, 잔여 4석
-- `13:20-15:27`, 총 32석, 예매 27석, 잔여 5석
-- `16:00-18:07`, 총 32석, 예매 32석, 잔여 0석
-- `18:40-20:47`, 총 32석, 예매 22석, 잔여 10석
+- `10:40-12:47`, 총 32석, 잔여 28석, 예매 4석
+- `13:20-15:27`, 총 32석, 잔여 27석, 예매 5석
+- `16:00-18:07`, 총 32석, 잔여 32석, 예매 0석
+- `18:40-20:47`, 총 32석, 잔여 22석, 예매 10석
 
 ### 2.3 `POST /LCWS/Ticketing/TicketingData.aspx` + `MethodName=GetInvisibleMoviePlayInfo`
 
@@ -300,11 +305,10 @@ remainingSeats = TotalSeatCount - BookingSeatCount
 #### 주의점
 
 - 동일 조건에서:
-  - `GetPlaySequence.BookingSeatCount = 28`
-  - `GetSeats.ScreenSeatInfo.BookingCount = 4`
-- 따라서 현재 시점에서는 `GetSeats`의 `BookingSeats`/`BookingCount` 의미가
-  "최종 판매 좌석 수"와 다를 가능성이 큼
-- 잔여 좌석 기능은 `GetPlaySequence` 기반으로 구현하는 편이 안전함
+  - `GetPlaySequence.BookingSeatCount = 28` (잔여/예매 가능)
+  - `GetSeats.ScreenSeatInfo.BookingCount = 4` (실제 점유)
+- 두 값은 모순이 아니라 의미가 다르다. `32 - 28 = 4`로 맞는다.
+- 잔여 좌석 기능은 `GetPlaySequence.BookingSeatCount`를 그대로 쓰면 된다.
 
 ### 2.5 `POST /LCWS/Common/MainData.aspx` + `MethodName=GetPopupMessageOnLine`
 
diff --git a/openapi.json b/openapi.json
index c8691e12..6636c6eb 100644
--- a/openapi.json
+++ b/openapi.json
@@ -2726,11 +2726,11 @@
           },
           "bookedSeats": {
             "type": "integer",
-            "example": 28
+            "example": 4
           },
           "remainingSeats": {
             "type": "integer",
-            "example": 4
+            "example": 28
           }
         }
       },
diff --git a/openapi.yaml b/openapi.yaml
index 530454fd..66873ba4 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -1920,10 +1920,10 @@ components:
           example: 32
         bookedSeats:
           type: integer
-          example: 28
+          example: 4
         remainingSeats:
           type: integer
-          example: 4
+          example: 28
     LotteCinemaTheaterSearchResponse:
       type: object
       properties:
diff --git a/src/pages/openapiSpecComponentsLottecinema.ts b/src/pages/openapiSpecComponentsLottecinema.ts
index 3caf4126..57afd627 100644
--- a/src/pages/openapiSpecComponentsLottecinema.ts
+++ b/src/pages/openapiSpecComponentsLottecinema.ts
@@ -50,8 +50,8 @@ export const OPENAPI_LOTTECINEMA_COMPONENT_SCHEMAS = {
       startTime: { type: 'string', example: '10:40' },
       endTime: { type: 'string', example: '12:47' },
       totalSeats: { type: 'integer', example: 32 },
-      bookedSeats: { type: 'integer', example: 28 },
-      remainingSeats: { type: 'integer', example: 4 },
+      bookedSeats: { type: 'integer', example: 4 },
+      remainingSeats: { type: 'integer', example: 28 },
     },
   },
   LotteCinemaTheaterSearchResponse: {
diff --git a/src/services/lottecinema/client.ts b/src/services/lottecinema/client.ts
index 81ef3517..346c14d3 100644
--- a/src/services/lottecinema/client.ts
+++ b/src/services/lottecinema/client.ts
@@ -160,7 +160,9 @@ async function fetchPlaySequenceByPair(
     .filter((item) => item.CinemaID && item.RepresentationMovieCode && item.ScreenID && item.PlaySequence)
     .map((item) => {
       const totalSeats = toNumber(item.TotalSeatCount);
-      const bookedSeats = toNumber(item.BookingSeatCount);
+      // 공식 BookingSeatCount는 예매된 수가 아니라 예매 가능(잔여) 좌석 수다.
+      const remainingSeats = toNumber(item.BookingSeatCount);
+      const bookedSeats = Math.max(totalSeats - remainingSeats, 0);
       const normalizedPlayDate = normalizeDateForOutput(item.PlayDt || playDate);
       const theaterId = String(item.CinemaID);
       const screenId = String(item.ScreenID);
@@ -179,7 +181,7 @@ async function fetchPlaySequenceByPair(
         endTime: formatTime(item.EndTime),
         totalSeats,
         bookedSeats,
-        remainingSeats: Math.max(totalSeats - bookedSeats, 0),
+        remainingSeats,
       };
     });
 }
diff --git a/tests/services/lottecinema/client.test.ts b/tests/services/lottecinema/client.test.ts
index 548a08fc..f26559af 100644
--- a/tests/services/lottecinema/client.test.ts
+++ b/tests/services/lottecinema/client.test.ts
@@ -245,7 +245,10 @@ describe('fetchLotteCinemaNowShowing', () => {
     expect(result.theaters).toHaveLength(1);
     expect(result.movies).toHaveLength(1);
     expect(result.showtimes[0].scheduleId).toBe('20260310-1016-1201-1');
-    expect(result.showtimes[0].remainingSeats).toBe(4);
+    // BookingSeatCount는 예매 가능(잔여) 좌석 수다.
+    expect(result.showtimes[0].remainingSeats).toBe(28);
+    expect(result.showtimes[0].bookedSeats).toBe(4);
+    expect(result.showtimes[0].totalSeats).toBe(32);
   });
 
   it('movieId만 있으면 여러 극장을 순회해 회차를 모은다', async () => {
diff --git a/tests/services/lottecinema/tools/getRemainingSeats.test.ts b/tests/services/lottecinema/tools/getRemainingSeats.test.ts
index 192f75e8..5ccc0323 100644
--- a/tests/services/lottecinema/tools/getRemainingSeats.test.ts
+++ b/tests/services/lottecinema/tools/getRemainingSeats.test.ts
@@ -100,7 +100,8 @@ describe('createGetRemainingSeatsTool', () => {
 
     expect(parsed.count).toBe(2);
     expect(parsed.seats[0].startTime).toBe('10:40');
-    expect(parsed.seats[0].remainingSeats).toBe(4);
+    expect(parsed.seats[0].remainingSeats).toBe(28);
+    expect(parsed.seats[0].bookedSeats).toBe(4);
   });
 
   it('동일 시작 시간은 극장명으로 정렬한다', async () => {
@@ -303,6 +304,7 @@ describe('createGetRemainingSeatsTool', () => {
 
     expect(parsed.filters.theaterId).toBe('9001');
     expect(parsed.resolvedTheater.theaterName).toBe('안산중앙');
-    expect(parsed.seats[0].remainingSeats).toBe(4);
+    expect(parsed.seats[0].remainingSeats).toBe(28);
+    expect(parsed.seats[0].bookedSeats).toBe(4);
   });
 });