diff --git a/src/designer/Viewport.ts b/src/designer/Viewport.ts
index 2ee9b59..6aa4395 100644
--- a/src/designer/Viewport.ts
+++ b/src/designer/Viewport.ts
@@ -7,7 +7,8 @@ import type WorldModel from '@/designer/WorldModel.ts'
 import $ from 'jquery'
 import { reactive, watch } from 'vue'
 import MouseMoveInspect from '@/designer/model2DEditor/tools/MouseMoveInspect.ts'
-import type { ITools } from '@/designer/model2DEditor/tools/ITools.ts'
+import type { ITool } from '@/designer/model2DEditor/tools/ITool.ts'
+import RulerInspect from '@/designer/model2DEditor/tools/RulerInspect.ts'
 
 /**
  * 编辑器对象
@@ -26,7 +27,8 @@ export default class Viewport {
   raycaster: Raycaster
   animationFrameId: any = null
 
-  tools: ITools[] = [
+  cursorTool: ITool | null = null
+  tools: ITool[] = [
     new MouseMoveInspect()
   ]
 
@@ -35,7 +37,7 @@ export default class Viewport {
    */
   resizeObserver?: ResizeObserver
 
-  unwatchList: (() => void)[] = []
+  watchList: (() => void)[] = []
 
   //@ts-ignore
   state: ViewportState = reactive({
@@ -146,12 +148,36 @@ export default class Viewport {
 
     this.animate()
 
-    const unWatchFn = watch(() => this.state.camera.position.y, (newVal) => {
-      if (this.state.isReady) {
-        this.updateGridVisibility()
+    // 监听事件
+    this.watchList.push(watch(() => this.state.camera.position.y, (newVal) => {
+      if (!this.state.isReady) {
+        return
+      }
+      this.updateGridVisibility()
+    }))
+    this.watchList.push(watch(() => this.state.cursorMode, (newVal) => {
+      if (!this.state.isReady) {
+        return
+      }
+      if (this.cursorTool) {
+        this.cursorTool.destory()
+        this.cursorTool = null
+      }
+      if (newVal === 'normal' || !newVal) {
+        return
       }
-    })
-    this.unwatchList.push(unWatchFn)
+
+      if (newVal === 'Ruler') {
+        // 选择标尺工具
+        this.cursorTool = new RulerInspect()
+      } else {
+        system.showErrorDialog(`当前鼠标模式 ${newVal} 不支持`)
+      }
+
+      if (this.cursorTool) {
+        this.cursorTool.init(this)
+      }
+    }))
 
     if (this.resizeObserver) {
       this.resizeObserver.unobserve(this.viewerDom)
@@ -159,8 +185,10 @@ export default class Viewport {
     this.resizeObserver = new ResizeObserver(this.handleResize.bind(this))
     this.resizeObserver.observe(this.viewerDom)
 
+    // 初始化射线投射器
     this.raycaster = new Raycaster()
 
+    // 初始化所有常驻工具
     for (const tool of this.tools) {
       tool.init(this)
     }
@@ -311,11 +339,13 @@ export default class Viewport {
       this.animationFrameId = null
     }
 
-    if (this.unwatchList) {
-      _.forEach(this.unwatchList, (unWatchFn => {
-        unWatchFn()
+    if (this.watchList) {
+      _.forEach(this.watchList, (unWatchFn => {
+        if (typeof unWatchFn === 'function') {
+          unWatchFn()
+        }
       }))
-      this.unwatchList = []
+      this.watchList = []
     }
 
     if (this.tools) {
diff --git a/src/designer/model2DEditor/Model2DEditor.vue b/src/designer/model2DEditor/Model2DEditor.vue
index f4dcffb..f3e952e 100644
--- a/src/designer/model2DEditor/Model2DEditor.vue
+++ b/src/designer/model2DEditor/Model2DEditor.vue
@@ -12,7 +12,7 @@
       <div v-if="currentFloor" :key="currentFloor"
            class="canvas-container" ref="canvasContainer" tabindex="1" />
     </div>
-    <div class="section-bottom-toolbar section-toolbar" v-if="isReady">
+    <div class="section-bottom-toolbar section-toolbar">
       <div class="section-toolbar-left">
         <el-button title="鼠标状态 (ESC)" :icon="renderIcon('fa MousePointer')" link
                    :type="state.cursorMode==='normal'?'primary':''"
@@ -50,13 +50,13 @@
         <el-text type="danger">00011</el-text>
         <span class="section-toolbar-line"></span>
         <div>
-          {{ state.camera.position.x.toFixed(2) }},{{ state.camera.position.y.toFixed(2)
-          }},{{ state.camera.position.z.toFixed(2)
-          }}
+          {{ toFixed(state.camera.position.x) }},
+          {{ toFixed(state.camera.position.y) }},
+          {{ toFixed(state.camera.position.z) }}
         </div>
         <span class="section-toolbar-line"></span>
-        <div class="infor">
-          {{ state.mouse.x.toFixed(2) }},{{ state.mouse.z.toFixed(2) }}
+        <div>
+          {{ toFixed(state.mouse.x) }},{{ toFixed(state.mouse.z) }}
         </div>
       </div>
     </div>
diff --git a/src/designer/model2DEditor/Model2DEditorJs.js b/src/designer/model2DEditor/Model2DEditorJs.js
index 7e07e28..c4f6cfe 100644
--- a/src/designer/model2DEditor/Model2DEditorJs.js
+++ b/src/designer/model2DEditor/Model2DEditorJs.js
@@ -23,6 +23,15 @@ export default defineComponent({
   },
   methods: {
     renderIcon,
+    toFixed(num) {
+      if (num === undefined || num === null) {
+        return ''
+      }
+      if (isNaN(num)) {
+        return num
+      }
+      return parseFloat(num).toFixed(2)
+    },
     initByFloor(floor) {
       this.isReady = false
       const viewportOrigin = this.viewport
diff --git a/src/designer/model2DEditor/tools/CursorTool.ts b/src/designer/model2DEditor/tools/CursorTool.ts
new file mode 100644
index 0000000..18c64b6
--- /dev/null
+++ b/src/designer/model2DEditor/tools/CursorTool.ts
@@ -0,0 +1,11 @@
+export interface ITools {
+  /**
+   * 开始运行工具, 进入 cursor 状态
+   */
+  init(viewport: any): void
+
+  /**
+   * 停止运行工具, 鼠标点击右键, 或者 ESC 退出 cursor 状态
+   */
+  destory(): void
+}
\ No newline at end of file
diff --git a/src/designer/model2DEditor/tools/ITools.ts b/src/designer/model2DEditor/tools/ITool.ts
similarity index 63%
rename from src/designer/model2DEditor/tools/ITools.ts
rename to src/designer/model2DEditor/tools/ITool.ts
index 21a0a8f..0130e4c 100644
--- a/src/designer/model2DEditor/tools/ITools.ts
+++ b/src/designer/model2DEditor/tools/ITool.ts
@@ -1,4 +1,4 @@
-export interface ITools {
+export  interface ITool {
   init(viewport: any): void
 
   destory(): void
diff --git a/src/designer/model2DEditor/tools/MouseMoveInspect.ts b/src/designer/model2DEditor/tools/MouseMoveInspect.ts
index bd97d7c..12dd513 100644
--- a/src/designer/model2DEditor/tools/MouseMoveInspect.ts
+++ b/src/designer/model2DEditor/tools/MouseMoveInspect.ts
@@ -1,10 +1,10 @@
 import type Viewport from '@/designer/Viewport.ts'
-import type { ITools } from '@/designer/model2DEditor/tools/ITools.ts'
+import type { ITool } from '@/designer/model2DEditor/tools/ITool.ts'
 
 /**
  * 鼠标移动时，将鼠标位置的坐标转换为设计图上的坐标，并设置到 designer.mousePos 属性中
  */
-export default class MouseMoveInspect implements ITools {
+export default class MouseMoveInspect implements ITool {
   viewport: Viewport
 
   constructor() {
@@ -50,7 +50,7 @@ export default class MouseMoveInspect implements ITools {
     }
 
     this.viewport.state.mouse.x = Math.floor(intersects[0].point.x * 10) / 10
-    this.viewport.state.mouse.z = Math.floor(intersects[0].point.z * 10) / 10
+    this.viewport.state.mouse.z = Math.floor(intersects[1].point.z * 10) / 10
 
   }, 1)
 }
\ No newline at end of file
diff --git a/src/designer/model2DEditor/tools/RulerInspect.ts b/src/designer/model2DEditor/tools/RulerInspect.ts
new file mode 100644
index 0000000..3ec0792
--- /dev/null
+++ b/src/designer/model2DEditor/tools/RulerInspect.ts
@@ -0,0 +1,29 @@
+import type { ITool } from '@/designer/model2DEditor/tools/ITool.ts'
+import Viewport from '@/designer/Viewport.ts'
+
+export default class RulerInspect implements ITool {
+  viewport: Viewport
+
+  mouseMove(event: MouseEvent) {
+    const viewer = document.querySelector('.viewer') as HTMLElement
+    const rect = viewer.getBoundingClientRect()
+
+    const mouseX = event.clientX - rect.left
+    const mouseY = event.clientY - rect.top
+
+    console.log(`Mouse Position: (${mouseX}, ${mouseY})`)
+  }
+
+  init(viewport: Viewport) {
+    this.viewport = viewport
+    const viewerDom = this.viewport.viewerDom
+
+    system.msg('进入鼠标测距模式')
+  }
+
+  destory(): void {
+    const viewerDom = this.viewport.viewerDom
+    viewerDom.removeEventListener('mousemove', this.mouseMove)
+    system.msg('退出鼠标测距模式')
+  }
+}
\ No newline at end of file