diff --git a/src/renderer/src/i18n/locales/en-us.json b/src/renderer/src/i18n/locales/en-us.json
index 4a06b56c..bcdebb02 100644
--- a/src/renderer/src/i18n/locales/en-us.json
+++ b/src/renderer/src/i18n/locales/en-us.json
@@ -402,6 +402,7 @@
       "citations": "References",
       "copied": "Copied!",
       "copy.success": "Copied!",
+      "copy.failed": "Copy failed",
       "error.chunk_overlap_too_large": "Chunk overlap cannot be greater than chunk size",
       "error.dimension_too_large": "Content size is too large",
       "error.enter.api.host": "Please enter your API host first",
diff --git a/src/renderer/src/i18n/locales/ja-jp.json b/src/renderer/src/i18n/locales/ja-jp.json
index d075a7ce..115aeb11 100644
--- a/src/renderer/src/i18n/locales/ja-jp.json
+++ b/src/renderer/src/i18n/locales/ja-jp.json
@@ -402,6 +402,7 @@
       "citations": "参考文献",
       "copied": "コピーしました！",
       "copy.success": "コピーしました！",
+      "copy.failed": "コピーに失敗しました",
       "error.chunk_overlap_too_large": "チャンクの重なりは、チャンクサイズを超えることはできません",
       "error.dimension_too_large": "内容のサイズが大きすぎます",
       "error.enter.api.host": "APIホストを入力してください",
diff --git a/src/renderer/src/i18n/locales/ru-ru.json b/src/renderer/src/i18n/locales/ru-ru.json
index 53e300b4..179540cb 100644
--- a/src/renderer/src/i18n/locales/ru-ru.json
+++ b/src/renderer/src/i18n/locales/ru-ru.json
@@ -408,6 +408,7 @@
       "citations": "Источники",
       "copied": "Скопировано!",
       "copy.success": "Скопировано!",
+      "copy.failed": "Не удалось скопировать",
       "error.chunk_overlap_too_large": "Перекрытие фрагментов не может быть больше размера фрагмента.",
       "error.dimension_too_large": "Размер содержимого слишком велик",
       "error.enter.api.host": "Пожалуйста, введите ваш API хост",
diff --git a/src/renderer/src/i18n/locales/zh-cn.json b/src/renderer/src/i18n/locales/zh-cn.json
index 6bcf2ff6..90bff49e 100644
--- a/src/renderer/src/i18n/locales/zh-cn.json
+++ b/src/renderer/src/i18n/locales/zh-cn.json
@@ -402,6 +402,7 @@
       "citations": "引用内容",
       "copied": "已复制",
       "copy.success": "复制成功",
+      "copy.failed": "复制失败",
       "error.chunk_overlap_too_large": "分段重叠不能大于分段大小",
       "error.dimension_too_large": "内容尺寸过大",
       "error.enter.api.host": "请输入您的 API 地址",
diff --git a/src/renderer/src/i18n/locales/zh-tw.json b/src/renderer/src/i18n/locales/zh-tw.json
index 00785547..ca021830 100644
--- a/src/renderer/src/i18n/locales/zh-tw.json
+++ b/src/renderer/src/i18n/locales/zh-tw.json
@@ -400,8 +400,9 @@
       "backup.success": "備份成功",
       "chat.completion.paused": "聊天完成已暫停",
       "citations": "參考文獻",
-      "copied": "已複製",
-      "copy.success": "複製成功",
+      "copied": "已複製！",
+      "copy.success": "已複製！",
+      "copy.failed": "複製失敗",
       "error.chunk_overlap_too_large": "分段重疊不能大於分段大小",
       "error.dimension_too_large": "內容尺寸過大",
       "error.enter.api.host": "請先輸入您的 API 主機地址",
diff --git a/src/renderer/src/pages/home/Markdown/MermaidPopup.tsx b/src/renderer/src/pages/home/Markdown/MermaidPopup.tsx
index 7c6b1676..55b3db34 100644
--- a/src/renderer/src/pages/home/Markdown/MermaidPopup.tsx
+++ b/src/renderer/src/pages/home/Markdown/MermaidPopup.tsx
@@ -51,6 +51,46 @@ const PopupContainer: React.FC<Props> = ({ resolve, chart }) => {
     }
   }
 
+  const handleCopyImage = async () => {
+    try {
+      const element = document.getElementById(mermaidId)
+      if (!element) return
+
+      const svgElement = element.querySelector('svg')
+      if (!svgElement) return
+
+      const canvas = document.createElement('canvas')
+      const ctx = canvas.getContext('2d')
+      const img = new Image()
+      img.crossOrigin = 'anonymous'
+
+      const viewBox = svgElement.getAttribute('viewBox')?.split(' ').map(Number) || []
+      const width = viewBox[2] || svgElement.clientWidth || svgElement.getBoundingClientRect().width
+      const height = viewBox[3] || svgElement.clientHeight || svgElement.getBoundingClientRect().height
+
+      const svgData = new XMLSerializer().serializeToString(svgElement)
+      const svgBase64 = `data:image/svg+xml;base64,${btoa(unescape(encodeURIComponent(svgData)))}`
+
+      img.onload = async () => {
+        const scale = 3
+        canvas.width = width * scale
+        canvas.height = height * scale
+
+        if (ctx) {
+          ctx.scale(scale, scale)
+          ctx.drawImage(img, 0, 0, width, height)
+          const blob = await new Promise<Blob>((resolve) => canvas.toBlob((b) => resolve(b!), 'image/png'))
+          await navigator.clipboard.write([new ClipboardItem({ 'image/png': blob })])
+          window.message.success(t('message.copy.success'))
+        }
+      }
+      img.src = svgBase64
+    } catch (error) {
+      console.error('Copy failed:', error)
+      window.message.error(t('message.copy.failed'))
+    }
+  }
+
   const handleDownload = async (format: 'svg' | 'png') => {
     try {
       const element = document.getElementById(mermaidId)
@@ -132,6 +172,7 @@ const PopupContainer: React.FC<Props> = ({ resolve, chart }) => {
             <>
               <Button onClick={() => handleZoom(0.1)}>{t('mermaid.resize.zoom-in')}</Button>
               <Button onClick={() => handleZoom(-0.1)}>{t('mermaid.resize.zoom-out')}</Button>
+              <Button onClick={() => handleCopyImage()}>{t('common.copy')}</Button>
               <Button onClick={() => handleDownload('svg')}>{t('mermaid.download.svg')}</Button>
               <Button onClick={() => handleDownload('png')}>{t('mermaid.download.png')}</Button>
             </>