diff --git a/backend-node/src/app.ts b/backend-node/src/app.ts
index 1d1ad9a6..9d286648 100644
--- a/backend-node/src/app.ts
+++ b/backend-node/src/app.ts
@@ -345,11 +345,13 @@ app.listen(PORT, HOST, async () => {
       runDashboardMigration,
       runTableHistoryActionMigration,
       runDtgManagementLogMigration,
+      runApprovalSystemMigration,
     } = await import("./database/runMigration");
 
     await runDashboardMigration();
     await runTableHistoryActionMigration();
     await runDtgManagementLogMigration();
+    await runApprovalSystemMigration();
   } catch (error) {
     logger.error(`❌ 마이그레이션 실패:`, error);
   }
diff --git a/backend-node/src/database/runMigration.ts b/backend-node/src/database/runMigration.ts
index a1bb2ec5..07f714d6 100644
--- a/backend-node/src/database/runMigration.ts
+++ b/backend-node/src/database/runMigration.ts
@@ -2,6 +2,37 @@ import { PostgreSQLService } from "./PostgreSQLService";
 import fs from "fs";
 import path from "path";
 
+/**
+ * 결재 시스템 테이블 마이그레이션
+ * approval_definitions, approval_line_templates, approval_line_template_steps,
+ * approval_requests, approval_lines 테이블 생성
+ */
+export async function runApprovalSystemMigration() {
+  try {
+    console.log("🔄 결재 시스템 마이그레이션 시작...");
+
+    const sqlFilePath = path.join(
+      __dirname,
+      "../../db/migrations/100_create_approval_system.sql"
+    );
+
+    if (!fs.existsSync(sqlFilePath)) {
+      console.log("⚠️ 마이그레이션 파일이 없습니다:", sqlFilePath);
+      return;
+    }
+
+    const sqlContent = fs.readFileSync(sqlFilePath, "utf8");
+    await PostgreSQLService.query(sqlContent);
+
+    console.log("✅ 결재 시스템 마이그레이션 완료!");
+  } catch (error) {
+    console.error("❌ 결재 시스템 마이그레이션 실패:", error);
+    if (error instanceof Error && error.message.includes("already exists")) {
+      console.log("ℹ️ 테이블이 이미 존재합니다.");
+    }
+  }
+}
+
 /**
  * 데이터베이스 마이그레이션 실행
  * dashboard_elements 테이블에 custom_title, show_header 컬럼 추가