diff --git a/@sammo/game_logic/src/GameLogger.ts b/@sammo/game_logic/src/GameLogger.ts
index 71a779c..ffedae1 100644
--- a/@sammo/game_logic/src/GameLogger.ts
+++ b/@sammo/game_logic/src/GameLogger.ts
@@ -29,8 +29,12 @@ export class GameLoggerEngine {
     ) {
     }
 
-    public static initInstance(rsc: IResourceController) {
+    public static initInstance(rsc: IResourceController): GameLoggerEngine{
+        if(GameLoggerEngine.instance){
+            throw new Error("GameLogger is already initialized");
+        }
         GameLoggerEngine.instance = new GameLoggerEngine(rsc);
+        return GameLoggerEngine.instance;
     }
 
     public static getInstance(): GameLoggerEngine {
@@ -61,8 +65,12 @@ export class GameLoggerEngine {
     }
 
     flushAll() {
+        if(this.logStack.size === 0){
+            return;
+        }
         //rsc?
         throw new Error("Not yet implemented");
+        this.logStack.clear();
     }
 }
 
diff --git a/@sammo/game_logic/src/index.ts b/@sammo/game_logic/src/index.ts
index 1751e19..c07b8a1 100644
--- a/@sammo/game_logic/src/index.ts
+++ b/@sammo/game_logic/src/index.ts
@@ -2,5 +2,6 @@ export * from "./LogicFunc/generalStats.js";
 export * as defs from "./defs.js";
 export * from "./IResourceController.js";
 export * from "./ActionRequest/index.js";
+export * from "./GameLogger.js";
 // NOTE: game_logic은 client, server 모두에서 사용되는 라이브러리이다.
 // DB에 접근한다면 DI여야하나?
\ No newline at end of file
diff --git a/@sammo/server/src/GameEngine.ts b/@sammo/server/src/GameEngine.ts
index 5bdd73f..4d9256e 100644
--- a/@sammo/server/src/GameEngine.ts
+++ b/@sammo/server/src/GameEngine.ts
@@ -5,7 +5,7 @@ import { entriesWithType } from "@sammo/util/converter";
 import db from "./connectDB.js";
 import type { Mongoose } from "mongoose";
 import type { ActionPack, GameEngineMsg } from "./GameEngineDefs.js";
-import { ActionRequestList, type QueueType } from "@sammo/game_logic";
+import { ActionRequestList, GameLoggerEngine, type QueueType } from "@sammo/game_logic";
 export interface ActionRequest {
     name: keyof ActionPack;
     args: Parameters<ActionPack[keyof ActionPack]>[1];
@@ -45,12 +45,14 @@ export class GameEngine {
     } as const satisfies Record<QueueType, Denque<ActionRequestContainer>>;
 
     private rsc: ResourceController
+    private loggerEngine: GameLoggerEngine;
 
     private constructor(
         db: Mongoose,
         private postStatus: (msg: GameEngineMsg) => void,
     ) {
         this.rsc = new ResourceController(db);
+        this.loggerEngine = GameLoggerEngine.initInstance(this.rsc);
     }
 
     private continueRun = true;
@@ -88,6 +90,7 @@ export class GameEngine {
         if (processedGeneralCount > 0) {
             await this.prevSaveWaiter;
             const lastExecuted = this.rsc.gameEnv().raw.lastExecuted;
+            this.loggerEngine.flushAll();
             this.prevSaveWaiter = this.rsc.saveAll().then(() => {
                 this.postStatus({
                     type: 'update',
@@ -132,6 +135,7 @@ export class GameEngine {
             if (processEventCount > 0) {
                 await this.prevSaveWaiter;
                 this.prevSaveWaiter = null;
+                this.loggerEngine.flushAll();
                 await this.rsc.saveAll();
                 for (const response of responseQueue) {
                     response();