diff --git a/backend/app/http/admin/posts.go b/backend/app/http/admin/posts.go
index 587cb37..f353042 100644
--- a/backend/app/http/admin/posts.go
+++ b/backend/app/http/admin/posts.go
@@ -142,7 +142,7 @@ func (ctl *posts) Delete(ctx fiber.Ctx, id int64) error {
 
 type PostItem struct {
 	*model.Posts
-	Medias []*models.MediaItem `json:"medias"`
+	Medias []*model.Medias `json:"medias"`
 }
 
 // Show posts by id
@@ -161,15 +161,7 @@ func (ctl *posts) Show(ctx fiber.Ctx, id int64) (*PostItem, error) {
 		return nil, err
 	}
 	return &PostItem{
-		Posts: post,
-		Medias: lo.Map(medias, func(media *model.Medias, _ int) *models.MediaItem {
-			return &models.MediaItem{
-				ID:         media.ID,
-				Name:       media.Name,
-				UploadTime: media.CreatedAt.Format("2006-01-02 15:04:05"),
-				FileSize:   media.Size,
-				MimeType:   media.MimeType,
-			}
-		}),
+		Posts:  post,
+		Medias: medias,
 	}, nil
 }
diff --git a/backend/app/models/medias.go b/backend/app/models/medias.go
index dd6156e..3c22053 100644
--- a/backend/app/models/medias.go
+++ b/backend/app/models/medias.go
@@ -13,14 +13,6 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-type MediaItem struct {
-	ID         int64  `json:"id"`
-	Name       string `json:"name"`
-	UploadTime string `json:"upload_time"`
-	FileSize   int64  `json:"file_size"`
-	MimeType   string `json:"media_type"`
-}
-
 // @provider
 type mediasModel struct {
 	log *logrus.Entry `inject:"false"`
@@ -91,19 +83,8 @@ func (m *mediasModel) List(ctx context.Context, pagination *requests.Pagination,
 		return nil, err
 	}
 
-	// Convert model.Medias to MediaItem
-	mediaItems := lo.Map(medias, func(media model.Medias, _ int) *MediaItem {
-		return &MediaItem{
-			ID:         media.ID,
-			Name:       media.Name,
-			UploadTime: media.CreatedAt.Format("2006-01-02 15:04:05"),
-			FileSize:   media.Size,
-			MimeType:   media.MimeType,
-		}
-	})
-
 	return &requests.Pager{
-		Items:      mediaItems,
+		Items:      medias,
 		Total:      count,
 		Pagination: *pagination,
 	}, nil
diff --git a/frontend/admin/src/pages/MediaPage.vue b/frontend/admin/src/pages/MediaPage.vue
index 5628487..a34c345 100644
--- a/frontend/admin/src/pages/MediaPage.vue
+++ b/frontend/admin/src/pages/MediaPage.vue
@@ -7,14 +7,14 @@ import { InputText } from "primevue";
 import Badge from "primevue/badge";
 import Button from "primevue/button";
 import Column from "primevue/column";
-import ConfirmDialog from "primevue/confirmdialog";
 import DataTable from "primevue/datatable";
+import Dialog from 'primevue/dialog';
 import Dropdown from "primevue/dropdown";
 import ProgressSpinner from "primevue/progressspinner";
 import Toast from "primevue/toast";
 import { useConfirm } from "primevue/useconfirm";
 import { useToast } from "primevue/usetoast";
-import { computed, onMounted, ref } from "vue";
+import { computed, h, onMounted, ref } from "vue";
 import { useRouter } from "vue-router";
 
 import {
@@ -117,11 +117,74 @@ const icons = {
 const getFileIconComponent = (file) => {
     return getFileIcon(file, icons);
 };
+
+// Add Dialog control refs
+const previewDialogVisible = ref(false);
+const previewContent = ref(null);
+const previewHeader = ref('媒体预览');
+
+// 检查文件是否可预览
+const isPreviewable = (file) => {
+    if (!file?.mime_type) return false;
+    const type = file.mime_type.split('/')[0];
+    return ['image', 'video', 'audio'].includes(type);
+};
+
+// 预览文件
+const previewFile = (file) => {
+    if (!file?.mime_type) return;
+    const type = file.mime_type.split('/')[0];
+    const url = mediaService.getMediaPreviewUrl(file.id);
+
+    switch (type) {
+        case 'image':
+            previewContent.value = h('img', {
+                src: url,
+                style: {
+                    maxWidth: '100%',
+                    maxHeight: '80vh',
+                    objectFit: 'contain'
+                }
+            });
+            break;
+        case 'video':
+            previewContent.value = h('video', {
+                src: url,
+                controls: true,
+                style: {
+                    maxWidth: '100%',
+                    maxHeight: '80vh'
+                }
+            });
+            break;
+        case 'audio':
+            previewContent.value = h('audio', {
+                src: url,
+                controls: true,
+                style: {
+                    width: '100%'
+                }
+            });
+            break;
+        default:
+            return;
+    }
+
+    previewDialogVisible.value = true;
+};
 </script>
 
 <template>
     <Toast />
-    <ConfirmDialog />
+    <!-- Remove ConfirmDialog -->
+
+    <!-- Add Dialog component -->
+    <Dialog v-model:visible="previewDialogVisible" :modal="true" :header="previewHeader"
+        :style="{ width: '80vw', maxWidth: '1000px' }">
+        <div class="flex justify-center items-center">
+            <component :is="previewContent" />
+        </div>
+    </Dialog>
 
     <div class="w-full">
         <div class="flex justify-between items-center mb-6 gap-4">
@@ -173,17 +236,17 @@ const getFileIconComponent = (file) => {
                     </template>
                 </Column>
 
-                <Column field="upload_time" header="上传时间">
+                <Column field="created_at" header="上传时间">
                     <template #body="{ data }">
                         <div class="flex flex-col">
-                            <span class="text-gray-400"> {{ formatDate(data.upload_time) }}</span>
+                            <span class="text-gray-400"> {{ formatDate(data.created_at) }}</span>
                         </div>
                     </template>
                 </Column>
 
-                <Column field="file_size" header="文件大小">
+                <Column field="size" header="文件大小">
                     <template #body="{ data }">
-                        {{ formatFileSize(data.file_size) }}
+                        {{ formatFileSize(data.size) }}
                     </template>
                 </Column>
 
@@ -200,8 +263,8 @@ const getFileIconComponent = (file) => {
                 <Column header="" :exportable="false" style="min-width: 8rem">
                     <template #body="{ data }">
                         <div class="flex justify-center space-x-2">
-                            <Button icon="pi pi-eye" rounded text severity="info" @click="previewFile(data)"
-                                aria-label="Preview" />
+                            <Button v-if="isPreviewable(data)" icon="pi pi-eye" rounded text severity="info"
+                                @click="previewFile(data)" aria-label="Preview" />
                             <Button icon="pi pi-download" rounded text severity="secondary" @click="downloadFile(data)"
                                 aria-label="Download" />
                             <Button icon="pi pi-trash" rounded text severity="danger" @click="confirmDelete(data)"
@@ -224,4 +287,12 @@ const getFileIconComponent = (file) => {
     border-color: #4299e1;
     background-color: rgba(66, 153, 225, 0.05);
 }
+
+/* Add Dialog custom styles */
+:deep(.p-dialog-content) {
+    padding: 2rem;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+}
 </style>