diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6ae75aa..9382114 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,8 @@
 # Changelog
 
 ## [未发布 Unreleased]
+- GuLuLu 的像素点击判定增加图片加载保护：图片未就绪、加载失败或被替换成无法加载的文件时不再抛错，也不会把小人误判为「整只透明、点不到」（思路来自 EndoTheDev 的 PR #22）
+- GuLuLu's pixel hit-testing now guards against the image not being ready, failing to load or being replaced with an unloadable file: no more exceptions, and the sprite no longer becomes unclickable (approach from EndoTheDev's PR #22)
 - 资源监视器面板改为独立合成层（`will-change: transform`），它每帧重绘时不再连带重绘被它盖住的那块主画布
 - The resource monitor panel now gets its own compositor layer (`will-change: transform`), so its per-frame redraw no longer forces the main canvas region beneath it to repaint
 - 资源监视器的数据行和顶部的工作流进度条改为只创建一次：条形每帧用 transform 平滑跟随曲线（不触发布局），文字每 100ms 更新。此前每帧重写整块 innerHTML 并新建 canvas 量字宽，每秒数百次 DOM 重建，是拖动画布时掉帧的来源之一；现在单次开销降到 0.01ms 以下
diff --git a/README.md b/README.md
index 1288030..e7ea6b5 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,8 @@ This is a custom node utility package developed for ComfyUI. Initially created f
 ## 最新更新 / Last Update
 
 ### [未发布 Unreleased]
+- GuLuLu 的像素点击判定增加图片加载保护：图片未就绪、加载失败或被替换成无法加载的文件时不再抛错，也不会把小人误判为「整只透明、点不到」（思路来自 EndoTheDev 的 PR #22）  
+- GuLuLu's pixel hit-testing now guards against the image not being ready, failing to load or being replaced with an unloadable file: no more exceptions, and the sprite no longer becomes unclickable (approach from EndoTheDev's PR #22)  
 - 资源监视器面板改为独立合成层（`will-change: transform`），它每帧重绘时不再连带重绘被它盖住的那块主画布  
 - The resource monitor panel now gets its own compositor layer (`will-change: transform`), so its per-frame redraw no longer forces the main canvas region beneath it to repaint  
 - 资源监视器的数据行和顶部的工作流进度条改为只创建一次：条形每帧用 transform 平滑跟随曲线（不触发布局），文字每 100ms 更新。此前每帧重写整块 innerHTML 并新建 canvas 量字宽，每秒数百次 DOM 重建，是拖动画布时掉帧的来源之一；现在单次开销降到 0.01ms 以下  
diff --git a/web/gululu.js b/web/gululu.js
index a561d9e..1979823 100644
--- a/web/gululu.js
+++ b/web/gululu.js
@@ -109,6 +109,11 @@ const KayGuLuLuManager = {
             this.container.id = "kay-gululu-container";
             const img = document.createElement("img");
             img.src = this.imgSrc;
+            // 图片缺失或被用户换成加载不了的文件时，不要让后面的像素判定抛错
+            img.onerror = () => {
+                console.warn("[KayTool] GuLuLu image failed to load:", img.src);
+                this.pixelDataCache = null;
+            };
             img.alt = "GuLuLu";
             img.onload = () => {
                 this.updatePixelDataCache();
@@ -251,13 +256,24 @@ const KayGuLuLuManager = {
         if (containerRect.width === 0 || containerRect.height === 0) {
             return;
         }
+        // 像素判定依赖图片已经解码好；没就绪时读到的是整张透明，会让小人「点不到」，
+        // 坏图则会让 drawImage 直接抛 InvalidStateError。没就绪就跳过，等下次再算。
+        const img = this.container?.querySelector("img");
+        if (!img || !img.complete || img.naturalWidth === 0) {
+            this.pixelDataCache = null;
+            return;
+        }
         this.pixelCanvas.width = containerRect.width;
         this.pixelCanvas.height = containerRect.height;
         this.pixelCtx.clearRect(0, 0, this.pixelCanvas.width, this.pixelCanvas.height);
-        this.pixelCtx.drawImage(this.container.querySelector("img"), 0, 0, containerRect.width, containerRect.height);
-        this.pixelDataCache = this.pixelCtx.getImageData(0, 0, this.pixelCanvas.width, this.pixelCanvas.height);
-
-        this.calculateEffectiveBounds();
+        try {
+            this.pixelCtx.drawImage(img, 0, 0, containerRect.width, containerRect.height);
+            this.pixelDataCache = this.pixelCtx.getImageData(0, 0, this.pixelCanvas.width, this.pixelCanvas.height);
+            this.calculateEffectiveBounds();
+        } catch (e) {
+            console.warn("[KayTool] GuLuLu pixel cache update failed:", e);
+            this.pixelDataCache = null;
+        }
     },
 
     calculateEffectiveBounds() {