diff --git a/src/main/kotlin/club/sakunadaisuki/pcrediveclanrecordbackend/database/service/BattleRecordService.kt b/src/main/kotlin/club/sakunadaisuki/pcrediveclanrecordbackend/database/service/BattleRecordService.kt
index 1de9b20..97adac8 100644
--- a/src/main/kotlin/club/sakunadaisuki/pcrediveclanrecordbackend/database/service/BattleRecordService.kt
+++ b/src/main/kotlin/club/sakunadaisuki/pcrediveclanrecordbackend/database/service/BattleRecordService.kt
@@ -11,6 +11,8 @@ import com.mongodb.client.model.Filters.and
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import org.bson.Document
+import java.time.LocalDate
+import java.time.YearMonth
 
 class BattleRecordService(private val database: MongoDatabase) {
     var collection: MongoCollection<Document>
@@ -70,4 +72,29 @@ class BattleRecordService(private val database: MongoDatabase) {
         collection.insertMany(emptyBattleRecordList.map { it.toDocument() })
         collection.find(Filters.eq("date", date)).toList().map(BattleRecordDto::fromDocument)
     }
+
+    suspend fun createTableMonth(date: String): List<List<BattleRecordDto>> = withContext(Dispatchers.IO) {
+        val memberList = memberCollection.find(Filters.eq("leave", false)).toList().map(MemberDto::fromDocument)
+
+        // 1. 指定年份與月份（例如：2026年8月）
+        val dateSplit = date.split("-").map { it.toInt() }
+        val yearMonth = YearMonth.of(dateSplit[0], dateSplit[1])
+
+        // 2. 取得該月最後一天的 LocalDate 物件
+        val lastDayOfMonth = yearMonth.atEndOfMonth()
+
+        // 3. 取得最後 5 天的日期列表（由舊到新排序）
+        val lastFiveDays: List<LocalDate> = (4 downTo 0).map { lastDayOfMonth.minusDays(it.toLong()) }
+
+        // 4. Temp list
+        val tables = mutableListOf<List<BattleRecordDto>>()
+
+        // 5. 寫入資料
+        lastFiveDays.forEach { date ->
+            val emptyBattleRecordList = memberList.map { it.toEmptyBattleRecordDto(date.toString()) }
+            tables.add(emptyBattleRecordList)
+            collection.insertMany(emptyBattleRecordList.map { it.toDocument() })
+        }
+        tables
+    }
 }
diff --git a/src/main/kotlin/club/sakunadaisuki/pcrediveclanrecordbackend/plugins/Mongo.kt b/src/main/kotlin/club/sakunadaisuki/pcrediveclanrecordbackend/plugins/Mongo.kt
index 2ad654a..ddf8308 100644
--- a/src/main/kotlin/club/sakunadaisuki/pcrediveclanrecordbackend/plugins/Mongo.kt
+++ b/src/main/kotlin/club/sakunadaisuki/pcrediveclanrecordbackend/plugins/Mongo.kt
@@ -130,12 +130,19 @@ fun Application.configureMongo() {
                 }
             }
 
-            post("/battle_record/create_table/{date}") {
+            post("/battle_record/create_table_day/{date}") {
                 val date = call.parameters["date"] ?: throw IllegalArgumentException("No date")
                 battleRecordService.createTable(date).let { battleRecord ->
                     call.respond(HttpStatusCode.OK, battleRecord)
                 }
             }
+
+            post("/battle_record/create_table_month/{date}") {
+                val date = call.parameters["date"] ?: throw IllegalArgumentException("No date")
+                battleRecordService.createTableMonth(date).let { battleRecordList ->
+                    call.respond(HttpStatusCode.OK, battleRecordList)
+                }
+            }
         }
     }
 }