diff --git a/M02_MasterTemplete/DataFlow/M02_DF_Router.py b/M02_MasterTemplete/DataFlow/M02_DF_Router.py
index 3892588d9..3e48df45c 100644
--- a/M02_MasterTemplete/DataFlow/M02_DF_Router.py
+++ b/M02_MasterTemplete/DataFlow/M02_DF_Router.py
@@ -311,20 +311,23 @@ def get_materials(q: str = "", sub: str = "", detail: str = "", page: int = 1, s
 
 @router.get("/standards")
 def get_standards() -> dict:
-    return _call(dv.standards, STANDARD, DATA)
+    return _call(dv.standards, STANDARD)
 
 
 def _standards_put(body: dict) -> dict:
+    """고친 표준 표 = 본 프로그램 값 — git 이 따라가는 `_standard/` 파일에 바로(시스템 관리자)."""
     dv.standards_check(body)
     for part, name in dv.STANDARDS.items():
-        _write(DATA / name, body[part])
-    return dv.standards(STANDARD, DATA)
+        tmp = STANDARD / f".{name}.tmp"
+        text = json.dumps(body[part], ensure_ascii=False, indent=2) + "\n"
+        tmp.write_text(text, encoding="utf-8", newline="\n")
+        os.replace(tmp, STANDARD / name)
+    return dv.standards(STANDARD)
 
 
 def _standards_reset() -> dict:
-    for name in dv.STANDARDS.values():
-        (DATA / name).unlink(missing_ok=True)
-    return dv.standards(STANDARD, DATA)
+    """고친 값을 따로 두지 않음(바로 저장) — 되돌릴 처음 값 없음 · 지금 값 그대로."""
+    return dv.standards(STANDARD)
 
 
 @router.put("/standards")
diff --git a/M02_MasterTemplete/DataFlow/M02_DF_Values.py b/M02_MasterTemplete/DataFlow/M02_DF_Values.py
index 2ddd9cb3e..4befa7693 100644
--- a/M02_MasterTemplete/DataFlow/M02_DF_Values.py
+++ b/M02_MasterTemplete/DataFlow/M02_DF_Values.py
@@ -550,13 +550,11 @@ def group_find(group: str, slot: dict, value: Any) -> dict:
 STANDARDS = {"unit": "단위표준.json", "money": "금액단위표준.json"}
 
 
-def standards(first: Any, mine: Any) -> dict:
-    """{unit, money, saved} — 고친 것(`_data`)이 있으면 그것 · 없으면 처음 값(`_standard`)."""
+def standards(folder: Any, _old: Any = None) -> dict:  # _old = 옛 고친 값 폴더(안 씀 · 옛 부름 꼴)
+    """{unit, money, saved} — 표준 표 파일(`_standard/` · 고치면 바로 그 파일) · saved 늘 False."""
     out: dict[str, Any] = {"saved": False}
     for part, name in STANDARDS.items():
-        path = mine / name if (mine / name).is_file() else first / name
-        out["saved"] = out["saved"] or path.parent == mine
-        out[part] = json.loads(path.read_text(encoding="utf-8"))
+        out[part] = json.loads((folder / name).read_text(encoding="utf-8"))
     return out
 
 
diff --git a/resources/tester/test_m01_api.py b/resources/tester/test_m01_api.py
index 4bcf6e1b6..094462d2d 100644
--- a/resources/tester/test_m01_api.py
+++ b/resources/tester/test_m01_api.py
@@ -152,6 +152,9 @@ def test_로직_목록_하나_시험계산(client: TestClient) -> None:
     assert all((x["구분"], x["상세구분"]) == (LOGIC_SUB, detail) for x in listed)
     assert not any(x["blocked"] for x in listed)
     files = _get(client, "/api/m01/groups/로직/files")["files"]
+    files = [
+        f for f in files if f["file"] != "로직_자체.json"
+    ]  # 자체 파일은 마스터 내용 따라 있다 없다 함
     assert files[0]["file"].startswith("로직_산림품셈_") and files[-1]["chapter"].startswith(
         "유지관리"
     )
diff --git a/resources/tester/test_m02_df_router.py b/resources/tester/test_m02_df_router.py
index fe51c9239..686cfc776 100644
--- a/resources/tester/test_m02_df_router.py
+++ b/resources/tester/test_m02_df_router.py
@@ -578,7 +578,12 @@ def test_선_규칙_끝수_재료_조건_설계_때_정할_것(client: TestClien
     assert bad["ports"]["f"]["합"] == "#N/A" and _d(bad["cost"]["재료비"]) == 0
 
 
-def test_표준_표_읽기_쓰기_처음값(client: TestClient, folder: Path) -> None:
+def test_표준_표_읽기_쓰기_바로_저장(client: TestClient, tmp_path: Path, monkeypatch) -> None:
+    """고친 표준 표 = `_standard/` 파일에 바로(본 프로그램 값) — 시험은 그 사본 폴더 · 정본 파일은 안 바뀜."""
+    real = cf.STANDARD
+    before = {p.name: p.read_bytes() for p in real.glob("*.json")}
+    shutil.copytree(real, tmp_path / "_standard")
+    monkeypatch.setattr(cf, "STANDARD", tmp_path / "_standard")
     first = client.get("/api/m02/df/standards").json()
     assert first["saved"] is False and first["unit"]["줄"] and first["money"]["줄"]
     edited = json.loads(json.dumps(first))
@@ -586,14 +591,15 @@ def test_표준_표_읽기_쓰기_처음값(client: TestClient, folder: Path) ->
     res = client.put(
         "/api/m02/df/standards", json={"unit": edited["unit"], "money": edited["money"]}
     )
-    assert res.status_code == 200 and res.json()["saved"] is True
+    assert res.status_code == 200
     assert client.get("/api/m02/df/standards").json()["money"]["줄"][4]["지위"] == 1
+    saved = json.loads((cf.STANDARD / "금액단위표준.json").read_text(encoding="utf-8"))
+    assert saved["줄"][4]["지위"] == 1  # 파일에 바로
     assert client.put("/api/m02/df/standards", json={"unit": {}, "money": {}}).status_code == 400
-    back = client.delete("/api/m02/df/standards").json()
     assert (
-        back["saved"] is False and back["money"]["줄"][4]["지위"] == first["money"]["줄"][4]["지위"]
-    )
-    assert (cf.STANDARD / "금액단위표준.json").is_file()  # 처음 값 파일은 그대로
+        client.delete("/api/m02/df/standards").json()["money"]["줄"][4]["지위"] == 1
+    )  # 되돌릴 처음 값 없음
+    assert {p.name: p.read_bytes() for p in real.glob("*.json")} == before
 
 
 def test_새_길도_시스템_관리자만(folder: Path) -> None: