diff --git a/dongjian-dashboard-back-service/src/main/java/com/dongjian/dashboard/back/service/impl/DeviceDataBaStatusServiceImpl.java b/dongjian-dashboard-back-service/src/main/java/com/dongjian/dashboard/back/service/impl/DeviceDataBaStatusServiceImpl.java
index 1547679..eeeb799 100644
--- a/dongjian-dashboard-back-service/src/main/java/com/dongjian/dashboard/back/service/impl/DeviceDataBaStatusServiceImpl.java
+++ b/dongjian-dashboard-back-service/src/main/java/com/dongjian/dashboard/back/service/impl/DeviceDataBaStatusServiceImpl.java
@@ -196,11 +196,20 @@ public class DeviceDataBaStatusServiceImpl implements DeviceDataBaStatusService
 		List<Object> yCommon = new ArrayList<>();
 
 		//** 获取昨日最新数据 **//
+
 		String redisKey = Constants.REDIS_BA_STATUS_LATEST_VALUE + DateUtil.getYesterdayInJapan();
+
+		boolean cacheExist = redisUtil.existsKey(redisKey);
+
 		Object cacheLastValue = redisUtil.HGet(redisKey, lineDataSearchParams.getDeviceId().toLowerCase());
 		if (null != cacheLastValue) {
             try {
-                LatestValueBO latestValueBO = objectMapper.readValue(JSONObject.toJSONString(cacheLastValue), LatestValueBO.class);
+				String value = cacheLastValue.toString();
+				// 如果是被双引号包住的 JSON（双层 JSON）
+				if (value.startsWith("\"")) {
+					value = objectMapper.readValue(value, String.class);
+				}
+				LatestValueBO latestValueBO = objectMapper.readValue(value, LatestValueBO.class);
 				String dateFormatted = Instant.ofEpochMilli(latestValueBO.getUpdateTs())
 						.atZone(Constants.ZONE_TOKYO)
 						.format(Constants.FORMATTER_YMDHMS);