diff --git a/src/components/fabric/QPolygon.js b/src/components/fabric/QPolygon.js
index 8e450e77..f5e7eaae 100644
--- a/src/components/fabric/QPolygon.js
+++ b/src/components/fabric/QPolygon.js
@@ -1,8 +1,15 @@
 import { fabric } from 'fabric'
 import { v4 as uuidv4 } from 'uuid'
 import { QLine } from '@/components/fabric/QLine'
-import { distanceBetweenPoints, findTopTwoIndexesByDistance, getDirectionByPoint, sortedPointLessEightPoint, sortedPoints } from '@/util/canvas-util'
-import { calculateAngle, drawRidgeRoof, drawShedRoof, inPolygon, toGeoJSON } from '@/util/qpolygon-utils'
+import {
+  distanceBetweenPoints,
+  findTopTwoIndexesByDistance,
+  getAllRelatedObjects,
+  getDirectionByPoint,
+  sortedPointLessEightPoint,
+  sortedPoints,
+} from '@/util/canvas-util'
+import { calculateAngle, drawRidgeRoof, inPolygon, toGeoJSON } from '@/util/qpolygon-utils'
 import * as turf from '@turf/turf'
 import { LINE_TYPE } from '@/common/common'
 
@@ -131,7 +138,7 @@ export const QPolygon = fabric.util.createClass(fabric.Polygon, {
     })
 
     this.on('removed', () => {
-      const children = this.canvas.getObjects().filter((obj) => obj.parentId === this.id)
+      const children = getAllRelatedObjects(this.id, this.canvas)
       children.forEach((child) => {
         this.canvas.remove(child)
       })
@@ -169,6 +176,7 @@ export const QPolygon = fabric.util.createClass(fabric.Polygon, {
           offset: 0,
         },
         parent: this,
+        parentId: this.id,
         direction: getDirectionByPoint(point, nextPoint),
         idx: i + 1,
       })
diff --git a/src/util/canvas-util.js b/src/util/canvas-util.js
index 1a78f991..a78beb15 100644
--- a/src/util/canvas-util.js
+++ b/src/util/canvas-util.js
@@ -925,3 +925,32 @@ export function checkLineOrientation(line) {
     return 'diagonal' // 대각선
   }
 }
+
+// 최상위 parentId를 통해 모든 하위 객체를 찾는 함수
+export const getAllRelatedObjects = (id, canvas) => {
+  const result = []
+  const map = new Map()
+
+  // Create a map of objects by their id
+  canvas.getObjects().forEach((obj) => {
+    map.set(obj.id, obj)
+  })
+
+  // Helper function to recursively find all related objects
+  function findRelatedObjects(id) {
+    const obj = map.get(id)
+    if (obj) {
+      result.push(obj)
+      canvas.getObjects().forEach((o) => {
+        if (o.parentId === id) {
+          findRelatedObjects(o.id)
+        }
+      })
+    }
+  }
+
+  // Start the search with the given parentId
+  findRelatedObjects(id)
+
+  return result
+}