diff --git a/electron/main/ipc.ts b/electron/main/ipc.ts
index 5c277e7..0e4665f 100644
--- a/electron/main/ipc.ts
+++ b/electron/main/ipc.ts
@@ -280,13 +280,16 @@ export function setupIpc(win: BrowserWindow): void {
     log.info(`rubric:getData: ${rows.length} rows`)
     if (rows.length) {
       return {
-        questions: rows.map(r => ({
-          questionTitle: r.question_title,
-          maxScore: r.max_score,
-          referenceAnswer: r.reference_answer,
-          rubric: r.rubric,
-          referenceAnswerImage: r.reference_answer_image || undefined
-        })),
+        questions: rows.map(r => {
+          const img = r.reference_answer_image
+          return {
+            questionTitle: r.question_title,
+            maxScore: r.max_score,
+            referenceAnswer: r.reference_answer,
+            rubric: r.rubric,
+            referenceAnswerImage: img && !img.startsWith('data:') ? `data:image/png;base64,${img}` : (img || undefined)
+          }
+        }),
         currentIndex: 0
       }
     }
@@ -297,13 +300,16 @@ export function setupIpc(win: BrowserWindow): void {
     const d = getDb()
     const rows: any[] = d.prepare('SELECT * FROM rubric ORDER BY sort_order').all()
     if (!rows.length) throw new Error('暂无评分标准可导出')
-    const questions = rows.map(r => ({
-      questionTitle: r.question_title,
-      maxScore: r.max_score,
-      referenceAnswer: r.reference_answer,
-      rubric: r.rubric,
-      referenceAnswerImage: r.reference_answer_image || undefined
-    }))
+    const questions = rows.map(r => {
+      const img = r.reference_answer_image
+      return {
+        questionTitle: r.question_title,
+        maxScore: r.max_score,
+        referenceAnswer: r.reference_answer,
+        rubric: r.rubric,
+        referenceAnswerImage: img && !img.startsWith('data:') ? `data:image/png;base64,${img}` : (img || undefined)
+      }
+    })
     const result = await dialogBox.showSaveDialog({
       defaultPath: '评分标准.json',
       filters: [{ name: 'JSON', extensions: ['json'] }]
@@ -418,11 +424,11 @@ ${extras?.maxScore ?? 100}
     ? [
         { type: 'text', text: prompt },
         { type: 'image_url', image_url: { url: `data:image/png;base64,${imageBase64}` } },
-        { type: 'image_url', image_url: { url: `data:image/png;base64,${extras!.referenceAnswerImage}` } }
+        { type: 'image_url', image_url: { url: extras!.referenceAnswerImage } }
       ]
     : [
-        { type: 'image_url', image_url: { url: `data:image/png;base64,${imageBase64}` } },
-        { type: 'text', text: prompt }
+        { type: 'text', text: prompt },
+        { type: 'image_url', image_url: { url: `data:image/png;base64,${imageBase64}` } }
       ]
 
   const response = await axios.post(`${config.baseUrl}/chat/completions`, {
diff --git a/src/components/ResultDrawer.vue b/src/components/ResultDrawer.vue
index 694da93..282212b 100644
--- a/src/components/ResultDrawer.vue
+++ b/src/components/ResultDrawer.vue
@@ -28,7 +28,7 @@
         <div class="result-section" v-if="currentQuestion.referenceAnswer">
           <div class="section-title">参考答案</div>
           <div class="reference-text">{{ currentQuestion.referenceAnswer }}</div>
-          <img v-if="currentQuestion.referenceAnswerImage" class="ref-image" :src="'data:image/png;base64,' + currentQuestion.referenceAnswerImage" />
+          <img v-if="currentQuestion.referenceAnswerImage" class="ref-image" :src="currentQuestion.referenceAnswerImage" />
         </div>
 
         <div class="result-score">
diff --git a/src/components/RubricEditor.vue b/src/components/RubricEditor.vue
index ae24450..d8ff8fc 100644
--- a/src/components/RubricEditor.vue
+++ b/src/components/RubricEditor.vue
@@ -142,7 +142,7 @@ async function uploadRefImage(idx: number) {
   if (!window.electronAPI) return
   const data = await window.electronAPI.dialog.openImage()
   if (data) {
-    questions.value[idx].referenceAnswerImage = data.base64
+    questions.value[idx].referenceAnswerImage = `data:${data.mime};base64,${data.base64}`
   }
 }