diff --git a/frontend/client-portal/src/pages/AlarmCenter/ServiceMonitoring.tsx b/frontend/client-portal/src/pages/AlarmCenter/ServiceMonitoring.tsx
index 9b75ce5d..acbf7e28 100644
--- a/frontend/client-portal/src/pages/AlarmCenter/ServiceMonitoring.tsx
+++ b/frontend/client-portal/src/pages/AlarmCenter/ServiceMonitoring.tsx
@@ -400,7 +400,7 @@ export default function ServiceMonitoring() {
                             <TimelineConnector sx={{border: '0.5px dashed rgba(145, 158, 171, 0.32)', backgrounSize: '4px 4px'  }} />
                           </TimelineSeparator>
                           <TimelineContent>
-                            <Typography variant='h5' sx={{marginBottom: 2}}> {fDateSuffix(row.date)}</Typography>
+                            <Typography variant='h5' sx={{marginBottom: 2}}> {row.date ? fDateSuffix(row.date) : '-'}</Typography>
                             <Card sx={{paddinX:2, paddingY:2}} >
                               <Stack direction={'row'} sx={{ alignItems: 'center', padding: 2, justifyContent: 'space-between' }}>
                                 <Label> {row.time} </Label>
@@ -530,7 +530,7 @@ export default function ServiceMonitoring() {
                                       <TableBody>
                                         <TableRow>
                                           <TableCell>
-                                            <Label> {fDateTime(list.datetime)}</Label>
+                                            <Label> {list.datetime ? fDateTime(list.datetime) : '-'}</Label>
                                           </TableCell>
                                           <TableCell>{list.examination}</TableCell>
                                           <TableCell>{list.location}</TableCell>