diff --git a/src/main/kotlin/com/android/trisolarisserver/controller/RoomImages.kt b/src/main/kotlin/com/android/trisolarisserver/controller/RoomImages.kt
index c2ec4f4..c62c74f 100644
--- a/src/main/kotlin/com/android/trisolarisserver/controller/RoomImages.kt
+++ b/src/main/kotlin/com/android/trisolarisserver/controller/RoomImages.kt
@@ -14,6 +14,7 @@ import org.springframework.http.HttpStatus
 import org.springframework.http.MediaType
 import org.springframework.http.ResponseEntity
 import org.springframework.security.core.annotation.AuthenticationPrincipal
+import org.springframework.transaction.annotation.Transactional
 import org.springframework.web.bind.annotation.DeleteMapping
 import org.springframework.web.bind.annotation.GetMapping
 import org.springframework.web.bind.annotation.PathVariable
@@ -100,6 +101,7 @@ class RoomImages(
 
     @DeleteMapping("/{imageId}")
     @ResponseStatus(HttpStatus.NO_CONTENT)
+    @Transactional
     fun delete(
         @PathVariable propertyId: UUID,
         @PathVariable roomId: UUID,
@@ -113,6 +115,7 @@ class RoomImages(
 
         val image = roomImageRepo.findByIdAndRoomIdAndPropertyId(imageId, roomId, propertyId)
             ?: throw ResponseStatusException(HttpStatus.NOT_FOUND, "Image not found")
+        val roomTypeCode = image.roomTypeCode
         try {
             Files.deleteIfExists(Paths.get(image.originalPath))
             Files.deleteIfExists(Paths.get(image.thumbnailPath))
@@ -120,6 +123,34 @@ class RoomImages(
             throw ResponseStatusException(HttpStatus.INTERNAL_SERVER_ERROR, "Failed to delete image files")
         }
         roomImageRepo.delete(image)
+
+        // Reorder room-specific sequence
+        val roomImages = roomImageRepo.findByRoomIdForReorder(roomId)
+        if (roomImages.isNotEmpty()) {
+            var order = 1
+            for (img in roomImages) {
+                if (img.roomSortOrder != order) {
+                    img.roomSortOrder = order
+                }
+                order++
+            }
+            roomImageRepo.saveAll(roomImages)
+        }
+
+        // Reorder room-type sequence
+        if (!roomTypeCode.isNullOrBlank()) {
+            val roomTypeImages = roomImageRepo.findByRoomTypeCodeForReorder(roomTypeCode)
+            if (roomTypeImages.isNotEmpty()) {
+                var order = 1
+                for (img in roomTypeImages) {
+                    if (img.roomTypeSortOrder != order) {
+                        img.roomTypeSortOrder = order
+                    }
+                    order++
+                }
+                roomImageRepo.saveAll(roomTypeImages)
+            }
+        }
     }
 
     @GetMapping("/{imageId}/file")
diff --git a/src/main/kotlin/com/android/trisolarisserver/repo/RoomImageRepo.kt b/src/main/kotlin/com/android/trisolarisserver/repo/RoomImageRepo.kt
index 6912525..2a99069 100644
--- a/src/main/kotlin/com/android/trisolarisserver/repo/RoomImageRepo.kt
+++ b/src/main/kotlin/com/android/trisolarisserver/repo/RoomImageRepo.kt
@@ -16,6 +16,26 @@ interface RoomImageRepo : JpaRepository<RoomImage, UUID> {
         """
     )
     fun findByRoomIdOrdered(@Param("roomId") roomId: UUID): List<RoomImage>
+
+    @Query(
+        """
+        select ri
+        from RoomImage ri
+        where ri.room.id = :roomId
+        order by ri.roomSortOrder asc, ri.createdAt desc
+        """
+    )
+    fun findByRoomIdForReorder(@Param("roomId") roomId: UUID): List<RoomImage>
+
+    @Query(
+        """
+        select ri
+        from RoomImage ri
+        where ri.roomTypeCode = :roomTypeCode
+        order by ri.roomTypeSortOrder asc, ri.createdAt desc
+        """
+    )
+    fun findByRoomTypeCodeForReorder(@Param("roomTypeCode") roomTypeCode: String): List<RoomImage>
     fun findByIdAndRoomIdAndPropertyId(id: UUID, roomId: UUID, propertyId: UUID): RoomImage?
     fun existsByRoomIdAndContentHash(roomId: UUID, contentHash: String): Boolean