diff --git a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/TDengineService.java b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/TDengineService.java
index 273780cfe..57ab7277e 100644
--- a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/TDengineService.java
+++ b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/TDengineService.java
@@ -2883,6 +2883,7 @@ public class TDengineService {
         List<Object> params = new ArrayList<>();
 
         sql.append("SELECT ")
+                .append("TO_CHAR(_wstart, 'YYYY-MM-DD HH24:MI:SS') AS hourTime, ")
                 .append("TO_CHAR(_wstart, 'HH24') AS hourValue, ")
                 .append("SUM(CASE WHEN rule = '0' THEN 1 ELSE 0 END) * 60 AS totalOfflineTime, ")
                 .append("SUM(CASE WHEN rule = '1' THEN 1 ELSE 0 END) * 60 AS totalRunningTime, ")
@@ -2896,7 +2897,7 @@ public class TDengineService {
             params.add(startTime);
         }
         if (endTime != null && !endTime.trim().isEmpty()) {
-            sql.append("AND create_time <= ? ");
+            sql.append("AND create_time < ? ");
             params.add(endTime);
         }
         if (deviceIds != null && !deviceIds.isEmpty()) {
diff --git a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/deviceoperationrecord/DeviceOperationRecordServiceImpl.java b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/deviceoperationrecord/DeviceOperationRecordServiceImpl.java
index 50eca9986..f5a7f98b0 100644
--- a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/deviceoperationrecord/DeviceOperationRecordServiceImpl.java
+++ b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/deviceoperationrecord/DeviceOperationRecordServiceImpl.java
@@ -472,7 +472,7 @@ public class DeviceOperationRecordServiceImpl implements DeviceOperationRecordSe
 
         List<Long> deviceIds = parseIds(pageReqVO.getIds());
         List<Map<String, Object>> hourlyRows = tDengineService.queryDeviceHourTrend(deviceIds, pageReqVO.getStartTime(), pageReqVO.getEndTime());
-        respVO.setHourlyStatus(buildHourlyStatus(hourlyRows));
+        respVO.setHourlyStatus(buildHourlyStatus(hourlyRows, pageReqVO.getStartTime(), pageReqVO.getEndTime()));
         //设备运行轨迹
         List<DeviceOperationOverviewRespVO.TimelineRowItem> timelineRows =
                 buildTimelineRows(records, deviceIds, pageReqVO.getStartTime(), pageReqVO.getEndTime());
@@ -500,19 +500,13 @@ public class DeviceOperationRecordServiceImpl implements DeviceOperationRecordSe
                 .collect(Collectors.toList());
     }
 
-    private List<DeviceOperationOverviewRespVO.HourlyStatusItem> buildHourlyStatus(List<Map<String, Object>> hourlyRows) {
-        Map<String, HourBucket> bucketMap = new LinkedHashMap<>();
-        for (int i = 0; i < 24; i++) {
-            String hour = String.format("%02d:00", i);
-            bucketMap.put(hour, new HourBucket(hour));
-        }
+    private List<DeviceOperationOverviewRespVO.HourlyStatusItem> buildHourlyStatus(List<Map<String, Object>> hourlyRows,
+                                                                                   String startTime,
+                                                                                   String endTime) {
+        Map<String, HourBucket> bucketMap = buildLast24HourBuckets(startTime, endTime);
 
         for (Map<String, Object> row : hourlyRows) {
-            Integer hourValue = getIntValue(row, "hourValue");
-            if (hourValue == null || hourValue < 0 || hourValue > 23) {
-                continue;
-            }
-            String hour = String.format("%02d:00", hourValue);
+            String hour = resolveHourBucketKey(row);
             HourBucket bucket = bucketMap.get(hour);
             if (bucket == null) {
                 continue;
@@ -535,6 +529,49 @@ public class DeviceOperationRecordServiceImpl implements DeviceOperationRecordSe
         }).collect(Collectors.toList());
     }
 
+    private Map<String, HourBucket> buildLast24HourBuckets(String startTime, String endTime) {
+        Map<String, HourBucket> bucketMap = new LinkedHashMap<>();
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(DateUtils.FORMAT_YEAR_MONTH_DAY_HOUR_MINUTE_SECOND);
+        try {
+            LocalDateTime end = LocalDateTime.parse(endTime, formatter).withMinute(0).withSecond(0).withNano(0);
+            LocalDateTime firstBucketEnd = end.minusHours(23);
+            for (int i = 0; i < 24; i++) {
+                String hour = firstBucketEnd.plusHours(i).format(formatter);
+                bucketMap.put(hour, new HourBucket(hour));
+            }
+            return bucketMap;
+        } catch (Exception ignored) {
+            for (int i = 0; i < 24; i++) {
+                String hour = String.format("%02d:00", i);
+                bucketMap.put(hour, new HourBucket(hour));
+            }
+            return bucketMap;
+        }
+    }
+
+    private String resolveHourBucketKey(Map<String, Object> row) {
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(DateUtils.FORMAT_YEAR_MONTH_DAY_HOUR_MINUTE_SECOND);
+        String hourTime = getStringValue(row, "hourTime");
+        if (StringUtils.isNotBlank(hourTime)) {
+            try {
+                return LocalDateTime.parse(hourTime, formatter)
+                        .plusHours(1)
+                        .withMinute(0)
+                        .withSecond(0)
+                        .withNano(0)
+                        .format(formatter);
+            } catch (Exception ignored) {
+                // Fallback to hourValue for old TDengine format compatibility.
+            }
+        }
+
+        Integer hourValue = getIntValue(row, "hourValue");
+        if (hourValue == null || hourValue < 0 || hourValue > 23) {
+            return null;
+        }
+        return String.format("%02d:00", hourValue);
+    }
+
     private double toPercent(double numerator, double denominator) {
         return denominator > 0 ? round2(numerator / denominator * 100) : 0D;
     }
@@ -738,6 +775,14 @@ public class DeviceOperationRecordServiceImpl implements DeviceOperationRecordSe
         }
     }
 
+    private String getStringValue(Map<String, Object> map, String key) {
+        Object value = map.get(key);
+        if (value == null) {
+            value = map.get(key.toLowerCase());
+        }
+        return value == null ? null : String.valueOf(value);
+    }
+
     private static class HourBucket {
         private final String hour;
         private double running;