diff --git a/src/components/fabric/QLine.js b/src/components/fabric/QLine.js
index 2d4294d6..03dd14db 100644
--- a/src/components/fabric/QLine.js
+++ b/src/components/fabric/QLine.js
@@ -95,6 +95,34 @@ export const QLine = fabric.util.createClass(fabric.Line, {
       if (this.attributes?.planeSize) {
         thisText.set({ planeSize: this.attributes.planeSize, text: this.attributes.planeSize.toString() })
       }
+      // 라인이 이동했을 수 있으므로 위치도 재계산해서 업데이트한다.
+      const sX = this.scaleX
+      const sY = this.scaleY
+      const tx1 = this.left
+      const ty1 = this.top
+      const tx2 = this.left + this.width * sX
+      const ty2 = this.top + this.height * sY
+      let nLeft, nTop
+      if (this.direction === 'left' || this.direction === 'right') {
+        nLeft = (tx1 + tx2) / 2
+        nTop = (ty1 + ty2) / 2 + 10
+      } else if (this.direction === 'top' || this.direction === 'bottom') {
+        nLeft = (tx1 + tx2) / 2 + 10
+        nTop = (ty1 + ty2) / 2
+      } else {
+        // 대각선
+        nLeft = (tx1 + tx2) / 2
+        nTop = (ty1 + ty2) / 2
+      }
+      thisText.set({
+        left: nLeft,
+        top: nTop,
+        minX: this.left,
+        maxX: this.left + this.width,
+        minY: this.top,
+        maxY: this.top + this.length,
+      })
+      thisText.setCoords?.()
     } else {
       this.setLength()
       const scaleX = this.scaleX
diff --git a/src/components/fabric/QPolygon.js b/src/components/fabric/QPolygon.js
index dbe6a9e3..b89e9daf 100644
--- a/src/components/fabric/QPolygon.js
+++ b/src/components/fabric/QPolygon.js
@@ -136,9 +136,59 @@ export const QPolygon = fabric.util.createClass(fabric.Polygon, {
     })
 
     this.on('modified', () => {
+      // 드래그 종료 시점의 delta 계산 (mousedown 에서 저장한 값 사용)
+      const hasPreDrag = this._preDragLeft != null && this._preDragTop != null
+      const dxModified = hasPreDrag ? this.left - this._preDragLeft : 0
+      const dyModified = hasPreDrag ? this.top - this._preDragTop : 0
+
       this.initLines()
       this.addLengthText()
       this.setCoords()
+
+      // 보조선 / 자식 객체들도 같이 이동시킨다 (ROOF 가 아닌 WALL 등에서도 동작하도록)
+      if ((dxModified !== 0 || dyModified !== 0) && this.canvas) {
+        const directChildren = this.canvas.getObjects().filter((obj) => {
+          if (obj === this) return false
+          if (obj.parentId !== this.id) return false
+          if (obj.name === 'lengthText') return false
+          return true
+        })
+        const childIds = new Set(directChildren.map((c) => c.id).filter(Boolean))
+
+        directChildren.forEach((obj) => {
+          const next = {}
+          if (obj.left != null) next.left = obj.left + dxModified
+          if (obj.top != null) next.top = obj.top + dyModified
+          if (obj.x1 != null) next.x1 = obj.x1 + dxModified
+          if (obj.y1 != null) next.y1 = obj.y1 + dyModified
+          if (obj.x2 != null) next.x2 = obj.x2 + dxModified
+          if (obj.y2 != null) next.y2 = obj.y2 + dyModified
+          obj.set(next)
+          if (obj.startPoint) obj.startPoint = { x: obj.startPoint.x + dxModified, y: obj.startPoint.y + dyModified }
+          if (obj.endPoint) obj.endPoint = { x: obj.endPoint.x + dxModified, y: obj.endPoint.y + dyModified }
+          obj.setCoords?.()
+        })
+
+        let movedTextCount = 0
+        this.canvas.getObjects().forEach((obj) => {
+          if (childIds.size > 0 && childIds.has(obj.parentId)) {
+            obj.set({ left: (obj.left ?? 0) + dxModified, top: (obj.top ?? 0) + dyModified })
+            if (obj.minX != null) obj.minX += dxModified
+            if (obj.maxX != null) obj.maxX += dxModified
+            if (obj.minY != null) obj.minY += dyModified
+            if (obj.maxY != null) obj.maxY += dyModified
+            obj.setCoords?.()
+            movedTextCount++
+          }
+        })
+        this.canvas.renderAll()
+
+        // ROOF 의 경우 polygonMoved 가 같은 일을 다시 하므로, _preDragLeft 는 거기서 정리됨
+        if (this.name !== POLYGON_TYPE.ROOF) {
+          this._preDragLeft = null
+          this._preDragTop = null
+        }
+      }
     })
 
     this.on('selected', () => {
@@ -168,9 +218,20 @@ export const QPolygon = fabric.util.createClass(fabric.Polygon, {
       })
     })
 
+    // 드래그 시작 전 위치를 기록해두고 polygonMoved 에서 델타 계산용으로 사용
+    this.on('mousedown', () => {
+      this._preDragLeft = this.left
+      this._preDragTop = this.top
+    })
+
     //QPolygon 좌표 이동시 좌표 재계산
     this.on('polygonMoved', () => {
       //폴리곤일때만 사용
+      // 드래그 전 left/top 이 있으면 delta 계산, 없으면 0
+      const hasPreDrag = this._preDragLeft != null && this._preDragTop != null
+      const deltaX = hasPreDrag ? this.left - this._preDragLeft : 0
+      const deltaY = hasPreDrag ? this.top - this._preDragTop : 0
+
       let matrix = this.calcTransformMatrix()
 
       let transformedPoints = this.get('points')
@@ -204,6 +265,64 @@ export const QPolygon = fabric.util.createClass(fabric.Polygon, {
 
       this.setCoords()
       this.initLines()
+      // 이동 후 기존 lengthText 가 이전 위치에 남아있지 않도록 재생성
+      this.addLengthText()
+
+      // 보조선(helpLine 등) 및 그 부속 객체(lengthText, pitchText 등)를 폴리곤 이동량만큼 같이 이동
+      if ((deltaX !== 0 || deltaY !== 0) && this.canvas) {
+        // drawHelpLine 이 추가하는 보조선들은 this.innerLines 배열에 들어가지 않을 수 있으므로
+        // canvas 에서 parentId === this.id 인 자식 객체들을 직접 찾는다.
+        // (단, 이 폴리곤의 outer lengthText 는 위에서 addLengthText() 로 이미 재생성했으므로 제외)
+        const directChildren = this.canvas.getObjects().filter((obj) => {
+          if (obj === this) return false
+          if (obj.parentId !== this.id) return false
+          if (obj.name === 'lengthText') return false // 이미 재생성됨
+          return true
+        })
+
+        const childIds = new Set(directChildren.map((c) => c.id).filter(Boolean))
+
+        const translateLineLike = (obj) => {
+          const next = {}
+          if (obj.left != null) next.left = obj.left + deltaX
+          if (obj.top != null) next.top = obj.top + deltaY
+          if (obj.x1 != null) next.x1 = obj.x1 + deltaX
+          if (obj.y1 != null) next.y1 = obj.y1 + deltaY
+          if (obj.x2 != null) next.x2 = obj.x2 + deltaX
+          if (obj.y2 != null) next.y2 = obj.y2 + deltaY
+          obj.set(next)
+          if (obj.startPoint) {
+            obj.startPoint = { x: obj.startPoint.x + deltaX, y: obj.startPoint.y + deltaY }
+          }
+          if (obj.endPoint) {
+            obj.endPoint = { x: obj.endPoint.x + deltaX, y: obj.endPoint.y + deltaY }
+          }
+          obj.setCoords?.()
+        }
+
+        directChildren.forEach(translateLineLike)
+
+        // 보조선의 텍스트(lengthText, pitchText 등)는 보조선 line.id 를 parentId 로 가짐 -> 같이 이동
+        let movedTextCount = 0
+        this.canvas.getObjects().forEach((obj) => {
+          if (childIds.size > 0 && childIds.has(obj.parentId)) {
+            obj.set({
+              left: (obj.left ?? 0) + deltaX,
+              top: (obj.top ?? 0) + deltaY,
+            })
+            if (obj.minX != null) obj.minX += deltaX
+            if (obj.maxX != null) obj.maxX += deltaX
+            if (obj.minY != null) obj.minY += deltaY
+            if (obj.maxY != null) obj.maxY += deltaY
+            obj.setCoords?.()
+            movedTextCount++
+          }
+        })
+        this.canvas.renderAll()
+      }
+
+      this._preDragLeft = null
+      this._preDragTop = null
     })
 
     // polygon.fillCell({ width: 50, height: 30, padding: 10 })
diff --git a/src/hooks/common/useRoofFn.js b/src/hooks/common/useRoofFn.js
index 7c32505e..e7a06d38 100644
--- a/src/hooks/common/useRoofFn.js
+++ b/src/hooks/common/useRoofFn.js
@@ -239,7 +239,13 @@ export function useRoofFn() {
       let mousePos = canvas.getPointer(event.e)
       mousePos = { x: Math.round(mousePos.x), y: Math.round(mousePos.y) }
 
-      const texts = canvas.getObjects().filter((obj) => obj.type === 'text' && (obj.attributes?.roofId === roof.id || obj.parentId === roof.id))
+      // 'text' 뿐 아니라 'textbox' (보조선의 lengthText 는 fabric.Textbox) 도 함께 제거.
+      // name 기반으로 필터링하는 게 더 안전하다.
+      const texts = canvas.getObjects().filter((obj) => {
+        const isTextObj = obj.type === 'text' || obj.type === 'textbox' || obj.name === 'lengthText' || obj.name === 'pitchText'
+        if (!isTextObj) return false
+        return obj.attributes?.roofId === roof.id || obj.parentId === roof.id
+      })
       texts.forEach((text) => canvas.remove(text))
 
       const allRoofObject = canvas