diff --git a/components/canvas/nodes/ImageNode.tsx b/components/canvas/nodes/ImageNode.tsx
index 3487e63de..f4562af47 100644
--- a/components/canvas/nodes/ImageNode.tsx
+++ b/components/canvas/nodes/ImageNode.tsx
@@ -407,25 +407,6 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
     return { top, left };
   };
 
-  const getNotePanelPosition = () => {
-    if (!containerRef.current || typeof window === "undefined") {
-      return { top: 0, left: 0 };
-    }
-
-    const rect = containerRef.current.getBoundingClientRect();
-    const panelWidth = 300;
-    const spacing = 12;
-    const maxTop = Math.max(12, window.innerHeight - 360);
-
-    let left = rect.right + spacing;
-    if (left + panelWidth > window.innerWidth - 12) {
-      left = Math.max(12, rect.left - panelWidth - spacing);
-    }
-
-    const top = Math.min(Math.max(12, rect.top + 8), maxTop);
-    return { top, left };
-  };
-
   const displayTitle = getImageNodeTitle(data, node.id);
 
   const handleSaveTitle = useCallback(() => {
@@ -1814,66 +1795,37 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
         document.body
       )}
 
-      {/* 图片备注面板 */}
-      {notePanelOpen && typeof document !== "undefined" && createPortal(
-        <div
-          className="fixed z-[10001] w-[300px] rounded-xl border border-amber-200 bg-amber-50/95 shadow-2xl backdrop-blur"
-          style={{
-            top: getNotePanelPosition().top,
-            left: getNotePanelPosition().left,
-          }}
-          onMouseDown={(e) => e.stopPropagation()}
-          onPointerDown={(e) => e.stopPropagation()}
-          onClick={(e) => e.stopPropagation()}
-        >
-          <div className="flex items-center justify-between px-4 py-3 border-b border-amber-200/80">
-            <div className="flex items-center gap-2 text-amber-800">
-              <StickyNote className="h-4 w-4" />
-              <span className="text-sm font-medium">图片备注</span>
-            </div>
-            <Button
-              variant="ghost"
-              size="icon"
-              className="h-7 w-7 text-amber-700 hover:text-amber-900 hover:bg-amber-100"
-              onClick={() => setNotePanelOpen(false)}
-            >
-              <X className="h-4 w-4" />
-            </Button>
-          </div>
-
-          <div className="px-4 py-3">
+      {/* 图片备注对话框 */}
+      <Dialog open={notePanelOpen} onOpenChange={setNotePanelOpen}>
+        <DialogContent className="sm:max-w-[560px] max-h-[85vh] overflow-y-auto">
+          <DialogHeader>
+            <DialogTitle className="flex items-center gap-2">
+              <StickyNote className="h-5 w-5" />
+              图片备注
+            </DialogTitle>
+          </DialogHeader>
+          <div className="space-y-3 py-1">
             <Textarea
               value={draftNote}
               onChange={(e) => setDraftNote(e.target.value)}
               placeholder="记录这张图的想法、待办或交付要求..."
-              rows={6}
-              className="resize-y bg-white/80 border-amber-200 focus-visible:ring-amber-300"
+              rows={8}
+              className="resize-y min-h-[180px]"
             />
-            <p className="mt-2 text-[11px] text-amber-700/80">
+            <p className="text-xs text-muted-foreground">
               备注仅在你点开时显示，不会直接覆盖在画面上。
             </p>
           </div>
-
-          <div className="flex items-center justify-between gap-2 px-4 py-3 border-t border-amber-200/80">
-            <Button
-              variant="ghost"
-              size="sm"
-              className="text-amber-700 hover:text-amber-900 hover:bg-amber-100"
-              onClick={() => setNotePanelOpen(false)}
-            >
+          <DialogFooter>
+            <Button variant="outline" onClick={() => setNotePanelOpen(false)}>
               取消
             </Button>
-            <Button
-              size="sm"
-              className="bg-amber-600 text-white hover:bg-amber-700"
-              onClick={handleSaveNote}
-            >
+            <Button onClick={handleSaveNote}>
               保存备注
             </Button>
-          </div>
-        </div>,
-        document.body
-      )}
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
 
       {/* 文字编辑面板（显示在图片节点旁边） */}
       {isSelected && textEditPanelOpen && data.src && typeof document !== "undefined" && createPortal(