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 5050a3a2a..000d28799 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
@@ -431,6 +431,24 @@ public class DeviceOperationRecordServiceImpl implements DeviceOperationRecordSe
         double faultRate = calculatePercent(totalFaultSeconds, onlineSeconds);
         double standbyRate = calculatePercent(totalStandbySeconds, onlineSeconds);
 
+        DeviceTotalTimeRecordReqVO previousReqVO = buildPreviousPeriodReqVO(pageReqVO);
+        List<DeviceTotalTimeRecordRespVO> previousRecords = queryDeviceStatsRaw(previousReqVO);
+        double previousTotalRunningSeconds = previousRecords.stream().mapToDouble(DeviceTotalTimeRecordRespVO::getTotalRunningTime).sum();
+        double previousTotalStandbySeconds = previousRecords.stream().mapToDouble(DeviceTotalTimeRecordRespVO::getTotalStandbyTime).sum();
+        double previousTotalFaultSeconds = previousRecords.stream().mapToDouble(DeviceTotalTimeRecordRespVO::getTotalFaultTime).sum();
+        double previousTotalOfflineSeconds = previousRecords.stream().mapToDouble(DeviceTotalTimeRecordRespVO::getTotalOfflineTime).sum();
+        double previousOnlineSeconds = previousTotalRunningSeconds + previousTotalStandbySeconds + previousTotalFaultSeconds;
+        double previousTotalSeconds = previousOnlineSeconds + previousTotalOfflineSeconds;
+        double previousUtilizationRate = calculatePercent(previousTotalRunningSeconds, previousOnlineSeconds);
+        double previousPowerOnRate = calculatePercent(previousOnlineSeconds, previousTotalSeconds);
+        double previousFaultRate = calculatePercent(previousTotalFaultSeconds, previousOnlineSeconds);
+        double previousStandbyRate = calculatePercent(previousTotalStandbySeconds, previousOnlineSeconds);
+
+        double utilizationRateChange = calculateMetricChange(utilizationRate, previousUtilizationRate);
+        double powerOnRateChange = calculateMetricChange(powerOnRate, previousPowerOnRate);
+        double faultRateChange = calculateMetricChange(faultRate, previousFaultRate);
+        double standbyRateChange = calculateMetricChange(standbyRate, previousStandbyRate);
+
         double totalRunningHours = secondsToHours(totalRunningSeconds);
         double totalStandbyHours = secondsToHours(totalStandbySeconds);
         double totalFaultHours = secondsToHours(totalFaultSeconds);
@@ -438,10 +456,10 @@ public class DeviceOperationRecordServiceImpl implements DeviceOperationRecordSe
         double totalHours = secondsToHours(totalSeconds);
 
         respVO.setMetrics(Arrays.asList(
-                DeviceOperationOverviewRespVO.MetricItem.builder().key("utilizationRate").icon("ep:pie-chart").value(round2(utilizationRate)).unit("%").change(0D).build(),
-                DeviceOperationOverviewRespVO.MetricItem.builder().key("powerOnRate").icon("ep:video-play").value(round2(powerOnRate)).unit("%").change(0D).build(),
-                DeviceOperationOverviewRespVO.MetricItem.builder().key("faultRate").icon("ep:warning").value(round2(faultRate)).unit("%").change(0D).build(),
-                DeviceOperationOverviewRespVO.MetricItem.builder().key("standbyRate").icon("ep:timer").value(round2(standbyRate)).unit("%").change(0D).build()
+                DeviceOperationOverviewRespVO.MetricItem.builder().key("utilizationRate").icon("ep:pie-chart").value(round2(utilizationRate)).unit("%").change(utilizationRateChange).build(),
+                DeviceOperationOverviewRespVO.MetricItem.builder().key("powerOnRate").icon("ep:video-play").value(round2(powerOnRate)).unit("%").change(powerOnRateChange).build(),
+                DeviceOperationOverviewRespVO.MetricItem.builder().key("faultRate").icon("ep:warning").value(round2(faultRate)).unit("%").change(faultRateChange).build(),
+                DeviceOperationOverviewRespVO.MetricItem.builder().key("standbyRate").icon("ep:timer").value(round2(standbyRate)).unit("%").change(standbyRateChange).build()
         ));
 
         respVO.setSummary(Arrays.asList(
@@ -542,6 +560,30 @@ public class DeviceOperationRecordServiceImpl implements DeviceOperationRecordSe
         return Math.round(value * 100D) / 100D;
     }
 
+    private DeviceTotalTimeRecordReqVO buildPreviousPeriodReqVO(DeviceTotalTimeRecordReqVO reqVO) {
+        DeviceTotalTimeRecordReqVO previousReqVO = new DeviceTotalTimeRecordReqVO();
+        previousReqVO.setIds(reqVO.getIds());
+        previousReqVO.setDeviceCode(reqVO.getDeviceCode());
+        previousReqVO.setDeviceName(reqVO.getDeviceName());
+        previousReqVO.setTimelinePageNo(reqVO.getTimelinePageNo());
+        previousReqVO.setTimelinePageSize(reqVO.getTimelinePageSize());
+
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(DateUtils.FORMAT_YEAR_MONTH_DAY_HOUR_MINUTE_SECOND);
+        LocalDateTime start = LocalDateTime.parse(reqVO.getStartTime(), formatter);
+        LocalDateTime end = LocalDateTime.parse(reqVO.getEndTime(), formatter);
+        Duration duration = Duration.between(start, end);
+        LocalDateTime previousStart = start.minusDays(1);
+        LocalDateTime previousEnd = previousStart.plus(duration);
+
+        previousReqVO.setStartTime(previousStart.format(formatter));
+        previousReqVO.setEndTime(previousEnd.format(formatter));
+        return previousReqVO;
+    }
+
+    private double calculateMetricChange(double current, double previous) {
+        return round2(current - previous);
+    }
+
     private List<DeviceOperationOverviewRespVO.TimelineRowItem> buildTimelineRows(List<DeviceTotalTimeRecordRespVO> records,
                                                                                   List<Long> deviceIds,
                                                                                   String startTime,