diff --git a/services/ai_automation_smoke_service.py b/services/ai_automation_smoke_service.py
index 29dc8c9..6cef2b8 100644
--- a/services/ai_automation_smoke_service.py
+++ b/services/ai_automation_smoke_service.py
@@ -214,6 +214,9 @@ def build_scheduled_automation_health_summary(
     sitewide_details = sitewide_readback.get("details") or {}
     visual_qa_readback = _find_check(source_result, "Sitewide visual QA readback")
     visual_qa_details = visual_qa_readback.get("details") or {}
+    if not visual_qa_readback or not visual_qa_details:
+        visual_qa_readback = _latest_sitewide_visual_qa_readback_check()
+        visual_qa_details = visual_qa_readback.get("details") or {}
     smoke_status = source_result.get("status") or ("warning" if latest_history else "warning")
     freshness_family = _history_freshness_family(
         latest_history,
@@ -1019,6 +1022,60 @@ def _sitewide_visual_qa_check() -> Dict[str, Any]:
         )
 
 
+def _latest_sitewide_visual_qa_readback_check() -> Dict[str, Any]:
+    """Read the latest visual QA artifact for scheduled summaries without running smoke."""
+    try:
+        from services.ai_surface_html_readback_service import build_sitewide_visual_qa_readback
+
+        readback = build_sitewide_visual_qa_readback()
+        summary = readback.get("summary") or {}
+        status = readback.get("status") or "warning"
+        route_count = int(summary.get("route_count") or 0)
+        viewport_count = int(summary.get("viewport_count") or 0)
+        failed_count = int(summary.get("failed_count") or 0)
+        return _check(
+            "Sitewide visual QA readback",
+            status,
+            (
+                f"Sitewide visual QA ok，{route_count} routes x {viewport_count} viewports 無 overflow 退化"
+                if status == "ok"
+                else (
+                    f"Sitewide visual QA 需更新或修復：failed={failed_count}、"
+                    f"routes={route_count}、stale={bool(summary.get('stale'))}"
+                )
+            ),
+            {
+                "policy": readback.get("policy"),
+                "result_count": int(summary.get("result_count") or 0),
+                "route_count": route_count,
+                "viewport_count": viewport_count,
+                "pass_count": int(summary.get("pass_count") or 0),
+                "failed_count": failed_count,
+                "overflow_issue_count": int(summary.get("overflow_issue_count") or 0),
+                "visual_offender_count": int(summary.get("visual_offender_count") or 0),
+                "artifact_path": readback.get("artifact_path"),
+                "artifact_exists": bool(readback.get("artifact_exists")),
+                "artifact_generated_at": readback.get("artifact_generated_at"),
+                "age_hours": summary.get("age_hours"),
+                "stale": bool(summary.get("stale")),
+                "next_machine_action": readback.get("next_machine_action"),
+                "writes_database": False,
+                "writes_database_count": 0,
+                "primary_human_gate_count": 0,
+            },
+        )
+    except Exception as exc:
+        return _check(
+            "Sitewide visual QA readback",
+            "warning",
+            f"Sitewide visual QA artifact fallback 無法讀取：{exc}",
+            {
+                "writes_database": False,
+                "primary_human_gate_count": 0,
+            },
+        )
+
+
 def collect_ai_automation_smoke(*, record_history: bool = True, history_limit: int = 20) -> Dict[str, Any]:
     checks: List[Dict[str, Any]] = [
         _event_router_check(),
diff --git a/tests/test_ai_automation_smoke_service.py b/tests/test_ai_automation_smoke_service.py
index 59c7482..82b45b7 100644
--- a/tests/test_ai_automation_smoke_service.py
+++ b/tests/test_ai_automation_smoke_service.py
@@ -335,6 +335,59 @@ def test_scheduled_automation_health_summary_can_use_current_smoke_without_recor
     assert not history_path.exists()
 
 
+def test_scheduled_automation_health_summary_falls_back_to_visual_qa_artifact(tmp_path, monkeypatch):
+    from datetime import datetime
+    from services import ai_automation_smoke_service as smoke
+    from services import ai_surface_html_readback_service as surface_service
+
+    history_path = tmp_path / "smoke_history.jsonl"
+    history_path.write_text(
+        json.dumps({
+            "generated_at": datetime.now().isoformat(timespec="seconds"),
+            "status": "ok",
+            "summary": {"ok": 9, "warning": 0, "critical": 0, "total": 9},
+            "checks": [],
+        }, ensure_ascii=False) + "\n",
+        encoding="utf-8",
+    )
+    monkeypatch.setattr(smoke, "_HISTORY_PATH", str(history_path))
+    monkeypatch.setattr(
+        surface_service,
+        "build_sitewide_visual_qa_readback",
+        lambda **_kwargs: {
+            "policy": "read_only_sitewide_visual_qa_readback_v1",
+            "status": "ok",
+            "artifact_path": "data/ai_automation/sitewide_visual_qa_latest.json",
+            "artifact_exists": True,
+            "artifact_generated_at": "2026-07-03T07:40:00",
+            "next_machine_action": "keep_sitewide_visual_qa_monitoring",
+            "summary": {
+                "result_count": 147,
+                "route_count": 49,
+                "viewport_count": 3,
+                "pass_count": 147,
+                "failed_count": 0,
+                "overflow_issue_count": 0,
+                "visual_offender_count": 0,
+                "stale": False,
+            },
+        },
+    )
+
+    summary = smoke.build_scheduled_automation_health_summary(
+        history_limit=5,
+        freshness_max_age_hours=9999,
+    )
+
+    visual_family = next(
+        item for item in summary["families"]
+        if item["key"] == "sitewide_visual_qa"
+    )
+    assert visual_family["status"] == "ok"
+    assert visual_family["details"]["route_count"] == 49
+    assert visual_family["details"]["failed_count"] == 0
+
+
 def test_scheduled_automation_health_summary_route_returns_compact_payload(tmp_path, monkeypatch):
     from datetime import datetime
     from flask import Flask