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 cb2b5d1f7..5050a3a2a 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
@@ -159,46 +159,7 @@ public class DeviceOperationRecordServiceImpl implements DeviceOperationRecordSe
 
     @Override
     public List<DeviceTotalTimeRecordRespVO> deviceOperationPageList(DeviceTotalTimeRecordReqVO pageReqVO) {
-
-        applyPeriodIfNecessary(pageReqVO);
-
-        List<DeviceTotalTimeRecordRespVO> deviceList =
-                deviceOperationRecordMapper.selectDeviceListFromMySQL(pageReqVO);
-
-        if (CollectionUtils.isEmpty(deviceList)) {
-            return Collections.emptyList();
-        }
-
-        List<Long> deviceIds = deviceList.stream()
-                .map(DeviceTotalTimeRecordRespVO::getId)
-                .collect(Collectors.toList());
-
-        List<Map<String, Object>> statsList =
-                deviceOperationRecordMapper.selectDeviceStatsFromTD(
-                        deviceIds,
-                        pageReqVO.getStartTime(),
-                        pageReqVO.getEndTime()
-                );
-
-        Map<Long, DeviceTotalTimeRecordRespVO> tdStatsMap = convertStatsListToMap(statsList);
-
-        List<DeviceTotalTimeRecordRespVO> result = new ArrayList<>();
-        for (DeviceTotalTimeRecordRespVO device : deviceList) {
-            DeviceTotalTimeRecordRespVO stats = tdStatsMap.get(device.getId());
-            if (stats != null) {
-                device.setTotalOfflineTime(stats.getTotalOfflineTime());
-                device.setTotalRunningTime(stats.getTotalRunningTime());
-                device.setTotalStandbyTime(stats.getTotalStandbyTime());
-                device.setTotalFaultTime(stats.getTotalFaultTime());
-            } else {
-                device.setTotalOfflineTime(0);
-                device.setTotalRunningTime(0);
-                device.setTotalStandbyTime(0);
-                device.setTotalFaultTime(0);
-            }
-            result.add(device);
-        }
-
+        List<DeviceTotalTimeRecordRespVO> result = queryDeviceStatsRaw(pageReqVO);
         calculateAndSetConvertedValues(result, pageReqVO);
         result.sort(Comparator.comparingDouble(this::parsePercentValue).reversed());
         return result;
@@ -455,20 +416,26 @@ public class DeviceOperationRecordServiceImpl implements DeviceOperationRecordSe
         //参数构造
         applyPeriodIfNecessary(pageReqVO);
 
-        List<DeviceTotalTimeRecordRespVO> records = deviceOperationPageList(pageReqVO);
+        List<DeviceTotalTimeRecordRespVO> records = queryDeviceStatsRaw(pageReqVO);
         DeviceOperationOverviewRespVO respVO = new DeviceOperationOverviewRespVO();
 
-        double totalRunningHours = records.stream().mapToDouble(DeviceTotalTimeRecordRespVO::getTotalRunningTime).sum();
-        double totalStandbyHours = records.stream().mapToDouble(DeviceTotalTimeRecordRespVO::getTotalStandbyTime).sum();
-        double totalFaultHours = records.stream().mapToDouble(DeviceTotalTimeRecordRespVO::getTotalFaultTime).sum();
-        double totalOfflineHours = records.stream().mapToDouble(DeviceTotalTimeRecordRespVO::getTotalOfflineTime).sum();
+        double totalRunningSeconds = records.stream().mapToDouble(DeviceTotalTimeRecordRespVO::getTotalRunningTime).sum();
+        double totalStandbySeconds = records.stream().mapToDouble(DeviceTotalTimeRecordRespVO::getTotalStandbyTime).sum();
+        double totalFaultSeconds = records.stream().mapToDouble(DeviceTotalTimeRecordRespVO::getTotalFaultTime).sum();
+        double totalOfflineSeconds = records.stream().mapToDouble(DeviceTotalTimeRecordRespVO::getTotalOfflineTime).sum();
 
-        double onlineHours = totalRunningHours + totalStandbyHours + totalFaultHours;
-        double totalHours = onlineHours + totalOfflineHours;
-        double utilizationRate = onlineHours > 0 ? totalRunningHours / onlineHours * 100 : 0D;
-        double powerOnRate = totalHours > 0 ? onlineHours / totalHours * 100 : 0D;
-        double faultRate = onlineHours > 0 ? totalFaultHours / onlineHours * 100 : 0D;
-        double standbyRate = onlineHours > 0 ? totalStandbyHours / onlineHours * 100 : 0D;
+        double onlineSeconds = totalRunningSeconds + totalStandbySeconds + totalFaultSeconds;
+        double totalSeconds = onlineSeconds + totalOfflineSeconds;
+        double utilizationRate = calculatePercent(totalRunningSeconds, onlineSeconds);
+        double powerOnRate = calculatePercent(onlineSeconds, totalSeconds);
+        double faultRate = calculatePercent(totalFaultSeconds, onlineSeconds);
+        double standbyRate = calculatePercent(totalStandbySeconds, onlineSeconds);
+
+        double totalRunningHours = secondsToHours(totalRunningSeconds);
+        double totalStandbyHours = secondsToHours(totalStandbySeconds);
+        double totalFaultHours = secondsToHours(totalFaultSeconds);
+        double totalOfflineHours = secondsToHours(totalOfflineSeconds);
+        double totalHours = secondsToHours(totalSeconds);
 
         respVO.setMetrics(Arrays.asList(
                 DeviceOperationOverviewRespVO.MetricItem.builder().key("utilizationRate").icon("ep:pie-chart").value(round2(utilizationRate)).unit("%").change(0D).build(),
@@ -554,6 +521,23 @@ public class DeviceOperationRecordServiceImpl implements DeviceOperationRecordSe
         return denominator > 0 ? round2(numerator / denominator * 100) : 0D;
     }
 
+    private double calculatePercent(double numerator, double denominator) {
+        return denominator > 0 ? numerator / denominator * 100D : 0D;
+    }
+
+    private double calculateUtilizationRate(DeviceTotalTimeRecordRespVO record) {
+        if (record == null) {
+            return 0D;
+        }
+        double runningSeconds = record.getTotalRunningTime();
+        double onlineSeconds = runningSeconds + record.getTotalStandbyTime() + record.getTotalFaultTime();
+        return round2(calculatePercent(runningSeconds, onlineSeconds));
+    }
+
+    private double secondsToHours(double seconds) {
+        return round2(seconds / 3600D);
+    }
+
     private double round2(double value) {
         return Math.round(value * 100D) / 100D;
     }
@@ -585,7 +569,7 @@ public class DeviceOperationRecordServiceImpl implements DeviceOperationRecordSe
             return DeviceOperationOverviewRespVO.TimelineRowItem.builder()
                     .id(String.valueOf(record.getId()))
                     .name(record.getDeviceName())
-                    .utilizationRate(parsePercentValue(record))
+                    .utilizationRate(calculateUtilizationRate(record))
                     .segments(segments)
                     .build();
         }).collect(Collectors.toList());
@@ -604,6 +588,47 @@ public class DeviceOperationRecordServiceImpl implements DeviceOperationRecordSe
         return rows.subList(fromIndex, toIndex);
     }
 
+    private List<DeviceTotalTimeRecordRespVO> queryDeviceStatsRaw(DeviceTotalTimeRecordReqVO pageReqVO) {
+        applyPeriodIfNecessary(pageReqVO);
+
+        List<DeviceTotalTimeRecordRespVO> deviceList =
+                deviceOperationRecordMapper.selectDeviceListFromMySQL(pageReqVO);
+
+        if (CollectionUtils.isEmpty(deviceList)) {
+            return Collections.emptyList();
+        }
+
+        List<Long> deviceIds = deviceList.stream()
+                .map(DeviceTotalTimeRecordRespVO::getId)
+                .collect(Collectors.toList());
+
+        List<Map<String, Object>> statsList =
+                deviceOperationRecordMapper.selectDeviceStatsFromTD(
+                        deviceIds,
+                        pageReqVO.getStartTime(),
+                        pageReqVO.getEndTime()
+                );
+
+        Map<Long, DeviceTotalTimeRecordRespVO> tdStatsMap = convertStatsListToMap(statsList);
+        List<DeviceTotalTimeRecordRespVO> result = new ArrayList<>();
+        for (DeviceTotalTimeRecordRespVO device : deviceList) {
+            DeviceTotalTimeRecordRespVO stats = tdStatsMap.get(device.getId());
+            if (stats != null) {
+                device.setTotalOfflineTime(stats.getTotalOfflineTime());
+                device.setTotalRunningTime(stats.getTotalRunningTime());
+                device.setTotalStandbyTime(stats.getTotalStandbyTime());
+                device.setTotalFaultTime(stats.getTotalFaultTime());
+            } else {
+                device.setTotalOfflineTime(0);
+                device.setTotalRunningTime(0);
+                device.setTotalStandbyTime(0);
+                device.setTotalFaultTime(0);
+            }
+            result.add(device);
+        }
+        return result;
+    }
+
     private List<DeviceOperationOverviewRespVO.TimelineSegmentItem> buildTimelineSegments(List<DeviceOperationRecordDO> timelineRecords,
                                                                                            LocalDateTime start,
                                                                                            LocalDateTime end,