diff --git a/src/components/fabric/QPolygon.js b/src/components/fabric/QPolygon.js
index c87d161f..8d173bc6 100644
--- a/src/components/fabric/QPolygon.js
+++ b/src/components/fabric/QPolygon.js
@@ -845,37 +845,33 @@ export const QPolygon = fabric.util.createClass(fabric.Polygon, {
     // 먼저 좌표 업데이트
     this.setCoords()
 
-    // 캔버스 줌과 viewport transform 고려한 좌표 변환
-    let localPoint = point
+    // viewport transform만 역변환 (캔버스 줌/팬 보정)
+    // 결과는 WORLD 좌표 (캔버스 좌표계)
+    let canvasPoint = point
     if (this.canvas) {
       const vpt = this.canvas.viewportTransform
       if (vpt) {
-        // viewport transform 역변환
         const inverted = fabric.util.invertTransform(vpt)
-        localPoint = fabric.util.transformPoint(point, inverted)
+        canvasPoint = fabric.util.transformPoint(point, inverted)
       }
     }
 
-    // 오브젝트의 transform matrix를 고려한 좌표 변환
-    const matrix = this.calcTransformMatrix()
-    const invertedMatrix = fabric.util.invertTransform(matrix)
-    const transformedPoint = fabric.util.transformPoint(localPoint, invertedMatrix)
-
-    // pathOffset을 고려한 최종 좌표 계산
-    const pathOffset = this.get('pathOffset')
-    const finalPoint = {
-      x: Number((transformedPoint.x + pathOffset.x).toFixed(this.toFixed)),
-      y: Number((transformedPoint.y + pathOffset.y).toFixed(this.toFixed)),
+    // canvasPoint는 WORLD 좌표
+    // inPolygonImproved에서 getCurrentPoints()도 WORLD 좌표를 반환
+    // 따라서 좌표 시스템이 일치함
+    const checkPoint = {
+      x: Number(canvasPoint.x.toFixed(this.toFixed)),
+      y: Number(canvasPoint.y.toFixed(this.toFixed)),
     }
 
     if (this.name === POLYGON_TYPE.ROOF && this.isFixed) {
-      const isInside = this.inPolygonImproved(finalPoint)
+      const isInside = this.inPolygonImproved(checkPoint)
       if (!this.selectable) {
         this.set('selectable', isInside)
       }
       return isInside
     } else {
-      return this.inPolygonImproved(finalPoint)
+      return this.inPolygonImproved(checkPoint)
     }
   },
 
diff --git a/src/components/floor-plan/modal/circuitTrestle/CircuitTrestleSetting.jsx b/src/components/floor-plan/modal/circuitTrestle/CircuitTrestleSetting.jsx
index f86a7ead..32e20ad4 100644
--- a/src/components/floor-plan/modal/circuitTrestle/CircuitTrestleSetting.jsx
+++ b/src/components/floor-plan/modal/circuitTrestle/CircuitTrestleSetting.jsx
@@ -5,12 +5,13 @@ import StepUp from '@/components/floor-plan/modal/circuitTrestle/step/StepUp'
 import { useMessage } from '@/hooks/useMessage'
 import { usePopup } from '@/hooks/usePopup'
 import PassivityCircuitAllocation from './step/type/PassivityCircuitAllocation'
+import BasicSetting from '@/components/floor-plan/modal/basic/BasicSetting'
 import { useMasterController } from '@/hooks/common/useMasterController'
-import { useRecoilState, useRecoilValue } from 'recoil'
+import { useRecoilState, useRecoilValue, useSetRecoilState } from 'recoil'
 import { GlobalDataContext } from '@/app/GlobalDataProvider'
-import { POLYGON_TYPE } from '@/common/common'
+import { POLYGON_TYPE, MENU } from '@/common/common'
 import { useSwal } from '@/hooks/useSwal'
-import { canvasState, canvasZoomState } from '@/store/canvasAtom'
+import { canvasState, canvasZoomState, currentMenuState } from '@/store/canvasAtom'
 
 import { useTrestle } from '@/hooks/module/useTrestle'
 import { moduleSelectionDataState, selectedModuleState } from '@/store/selectedModuleOptions'
@@ -29,11 +30,12 @@ const ALLOCATION_TYPE = {
 }
 export default function CircuitTrestleSetting({ id }) {
   const { getMessage } = useMessage()
-  const { closePopup } = usePopup()
+  const { closePopup, addPopup } = usePopup()
   const { apply, setViewCircuitNumberTexts, getEstimateData, clear: clearTrestle, setAllModuleSurfaceIsComplete } = useTrestle()
   const { swalFire } = useSwal()
   const { saveEstimate } = useEstimate()
   const canvas = useRecoilValue(canvasState)
+  const setCurrentMenu = useSetRecoilState(currentMenuState)
   const [canvasZoom, setCanvasZoom] = useRecoilState(canvasZoomState)
   const [tabNum, setTabNum] = useState(1)
   const [allocationType, setAllocationType] = useState(ALLOCATION_TYPE.AUTO)
@@ -106,6 +108,167 @@ export default function CircuitTrestleSetting({ id }) {
     }
   }, [])
 
+  // 모듈이 설치된 경우 rack설치 여부에 따라 설치 된 모듈 아래에 작은 모듈이 설치되어 있을 경우는 모듈 설치 메뉴 reopen
+  useEffect(() => {
+    const modules = canvas.getObjects().filter((obj) => obj.name === POLYGON_TYPE.MODULE)
+    if (modules.length === 0) {
+      return
+    }
+
+    /**
+     * 랙 설치 시 모듈 크기 검증
+     * - 남쪽: 아래쪽 모듈이 위쪽 모듈보다 커야 함
+     * - 북쪽: 위쪽 모듈이 아래쪽 모듈보다 커야 함
+     * - 동쪽: 오른쪽 모듈이 왼쪽 모듈보다 커야 함
+     * - 서쪽: 왼쪽 모듈이 오른쪽 모듈보다 커야 함
+     */
+    const validateModuleSizeForRack = (surface) => {
+      const { modules, direction, trestleDetail } = surface
+      const { rackYn, moduleIntvlHor, moduleIntvlVer } = trestleDetail
+
+      if (rackYn === 'N' || !modules || modules.length < 2) {
+        return true // 검증 통과
+      }
+
+      // 모듈 중심점 및 크기 정보 계산
+      const centerPoints = modules.map((module) => {
+        const { x, y } = module.getCenterPoint()
+        const { width, height } = module
+        return {
+          x,
+          y,
+          width: Math.floor(width),
+          height: Math.floor(height),
+          area: Math.floor(width) * Math.floor(height),
+        }
+      })
+
+      // 방향별 설정
+      const isVertical = direction === 'south' || direction === 'north'
+      const primaryInterval = isVertical ? moduleIntvlVer : moduleIntvlHor
+      const secondaryInterval = isVertical ? moduleIntvlHor : moduleIntvlVer
+
+      // 정렬 함수: 큰 모듈이 있어야 할 위치부터 시작
+      const getSortFn = () => {
+        switch (direction) {
+          case 'south': return (a, b) => b.y - a.y // 아래쪽(y 큼)부터
+          case 'north': return (a, b) => a.y - b.y // 위쪽(y 작음)부터
+          case 'east': return (a, b) => b.x - a.x  // 오른쪽(x 큼)부터
+          case 'west': return (a, b) => a.x - b.x  // 왼쪽(x 작음)부터
+          default: return () => 0
+        }
+      }
+
+      // 타겟 모듈 찾기 (현재 모듈보다 작아야 할 위치의 모듈)
+      const findTargetModules = (current, margin) => {
+        return centerPoints.filter(cp => {
+          const sameAxis = isVertical
+            ? Math.abs(cp.x - current.x) < margin
+            : Math.abs(cp.y - current.y) < margin
+          const targetDirection = direction === 'south' ? cp.y < current.y
+            : direction === 'north' ? cp.y > current.y
+            : direction === 'east' ? cp.x < current.x
+            : cp.x > current.x
+          return sameAxis && targetDirection
+        })
+      }
+
+      // 가장 가까운 타겟 모듈 찾기
+      const getClosestTarget = (filtered) => {
+        if (filtered.length === 0) return null
+        return filtered.reduce((closest, cp) => {
+          switch (direction) {
+            case 'south': return cp.y > closest.y ? cp : closest
+            case 'north': return cp.y < closest.y ? cp : closest
+            case 'east': return cp.x > closest.x ? cp : closest
+            case 'west': return cp.x < closest.x ? cp : closest
+            default: return closest
+          }
+        })
+      }
+
+      // 두 모듈 간 간격 계산
+      const getGap = (current, target) => {
+        if (isVertical) {
+          return direction === 'south'
+            ? (current.y - current.height / 2) - (target.y + target.height / 2)
+            : (target.y - target.height / 2) - (current.y + current.height / 2)
+        } else {
+          return direction === 'east'
+            ? (current.x - current.width / 2) - (target.x + target.width / 2)
+            : (target.x - target.width / 2) - (current.x + current.width / 2)
+        }
+      }
+
+      // 인접 모듈 여부 확인
+      const isAdjacent = (current, target) => {
+        const gap = getGap(current, target)
+        return gap >= 0 && gap <= primaryInterval + 1
+      }
+
+      // 정렬된 모듈 순회
+      const sortedPoints = [...centerPoints].sort(getSortFn())
+
+      for (const current of sortedPoints) {
+        // 1. 일반 배치: 같은 라인에서 인접 모듈 검사
+        const directTargets = findTargetModules(current, secondaryInterval)
+        const closestTarget = getClosestTarget(directTargets)
+
+        if (closestTarget && isAdjacent(current, closestTarget) && closestTarget.area > current.area) {
+          return false // 검증 실패
+        }
+
+        // 2. 물떼새 배치: 반 오프셋 위치의 인접 모듈 검사
+        const size = isVertical ? current.width : current.height
+        const halfOffset = (size + secondaryInterval) / 2
+
+        for (const sign of [-1, 1]) {
+          const offsetValue = sign * halfOffset
+          const findHalfTarget = centerPoints.filter((cp) => {
+            const offsetAxis = isVertical
+              ? Math.abs(cp.x - (current.x + offsetValue)) <= primaryInterval
+              : Math.abs(cp.y - (current.y + offsetValue)) <= primaryInterval
+            const targetDirection = direction === 'south' ? cp.y < current.y
+              : direction === 'north' ? cp.y > current.y
+              : direction === 'east' ? cp.x < current.x
+              : cp.x > current.x
+            return offsetAxis && targetDirection
+          })
+
+          const closestHalf = getClosestTarget(findHalfTarget)
+          if (closestHalf && isAdjacent(current, closestHalf) && closestHalf.area > current.area) {
+            return false // 검증 실패
+          }
+        }
+      }
+
+      return true // 검증 통과
+    }
+
+    // 모든 설치면에 대해 검증 수행
+    const moduleSetupSurfaces = canvas.getObjects().filter((obj) => obj.name === POLYGON_TYPE.MODULE_SETUP_SURFACE)
+    for (const surface of moduleSetupSurfaces) {
+      if (!validateModuleSizeForRack(surface)) {
+        swalFire({
+          text: getMessage('module.size.validation.rack.error'),
+          icon: 'error',
+          confirmFn: () => {
+            // 현재 팝업 닫기
+            closePopup(id)
+            // 메뉴 하이라이트 변경
+            setCurrentMenu(MENU.MODULE_CIRCUIT_SETTING.BASIC_SETTING)
+            // 모듈/가대설정 팝업 열기
+            const newPopupId = uuidv4()
+            clearTrestle()
+            setAllModuleSurfaceIsComplete(false)
+            addPopup(newPopupId, 1, <BasicSetting id={newPopupId} />)
+          },
+        })
+        return
+      }
+    }
+  }, [])
+
   const capture = async (type) => {
     beforeCapture(type)
 
diff --git a/src/components/floor-plan/modal/circuitTrestle/step/type/PassivityCircuitAllocation.jsx b/src/components/floor-plan/modal/circuitTrestle/step/type/PassivityCircuitAllocation.jsx
index 22b0dd16..df8ecde2 100644
--- a/src/components/floor-plan/modal/circuitTrestle/step/type/PassivityCircuitAllocation.jsx
+++ b/src/components/floor-plan/modal/circuitTrestle/step/type/PassivityCircuitAllocation.jsx
@@ -103,17 +103,6 @@ export default function PassivityCircuitAllocation(props) {
       surfaceType[`${surface.direction}-${surface.roofMaterial.pitch}`] = surface
     })
 
-    if (surfaceList.length > 1) {
-      if (Object.keys(surfaceType).length > 1) {
-        swalFire({
-          text: getMessage('module.circuit.fix.not.same.roof.error'),
-          type: 'alert',
-          icon: 'warning',
-        })
-        return
-      }
-    }
-
     if (!circuitNumber || circuitNumber === 0) {
       swalFire({
         text: getMessage('module.circuit.minimun.error'),
@@ -145,7 +134,11 @@ export default function PassivityCircuitAllocation(props) {
         originSurfaceList.concat(originSurfaceList).forEach((surface) => {
           surfaceType[`${surface.direction}-${surface.roofMaterial.pitch}`] = surface
         })
+        
 
+        break
+      }
+      case 'OUTDMULTI': {
         if (surfaceList.length > 1) {
           if (Object.keys(surfaceType).length > 1) {
             swalFire({
@@ -156,10 +149,6 @@ export default function PassivityCircuitAllocation(props) {
             return
           }
         }
-
-        break
-      }
-      case 'OUTDMULTI': {
         if (selectedModels.length > 1) {
           let result = false
 
diff --git a/src/hooks/module/useModule.js b/src/hooks/module/useModule.js
index fa51ca75..45b3b50f 100644
--- a/src/hooks/module/useModule.js
+++ b/src/hooks/module/useModule.js
@@ -84,6 +84,7 @@ export function useModule() {
         canvas.renderAll()
       })
 
+      const surfaceId = selectedModules[0].surfaceId
       if (isWarning) {
         swalFire({
           title: getMessage('can.not.move.module'),
@@ -96,11 +97,15 @@ export function useModule() {
                 top: module.originCoords.top,
                 fill: module.originCoords.fill,
               })
+              module.dirty = true
               module.setCoords()
             })
-            canvas.renderAll()
+            canvas.requestRenderAll()
+            recalculateAllModulesCoords(surfaceId)
           },
         })
+      } else {
+        recalculateAllModulesCoords(surfaceId)
       }
     }
   }
@@ -157,6 +162,7 @@ export function useModule() {
     activeModule.set({ strokeWidth: 3 })
 
     canvas.renderAll()
+    const surfaceId = activeModule.surfaceId
     if (isWarning) {
       swalFire({
         title: getMessage('can.not.move.module'),
@@ -165,11 +171,15 @@ export function useModule() {
         confirmFn: () => {
           modules.forEach((module) => {
             module.set({ top: module.originPos.top, left: module.originPos.left, fill: module.originPos.fill })
+            module.dirty = true
             module.setCoords()
           })
-          canvas.renderAll()
+          canvas.requestRenderAll()
+          recalculateAllModulesCoords(surfaceId)
         },
       })
+    } else {
+      recalculateAllModulesCoords(surfaceId)
     }
   }
 
@@ -202,6 +212,7 @@ export function useModule() {
       })
 
       canvas.renderAll()
+      const surfaceId = surface.id
       if (isWarning) {
         swalFire({
           title: getMessage('can.not.move.module'),
@@ -210,11 +221,15 @@ export function useModule() {
           confirmFn: () => {
             modules.forEach((module) => {
               module.set({ top: module.originPos.top, left: module.originPos.left, fill: module.originPos.fill })
+              module.dirty = true
               module.setCoords()
             })
-            canvas.renderAll()
+            canvas.requestRenderAll()
+            recalculateAllModulesCoords(surfaceId)
           },
         })
+      } else {
+        recalculateAllModulesCoords(surfaceId)
       }
     })
   }
@@ -269,6 +284,7 @@ export function useModule() {
         canvas.renderAll()
       })
 
+      const surfaceId = surface.id
       if (isWarning) {
         swalFire({
           title: getMessage('can.not.copy.module'),
@@ -276,11 +292,13 @@ export function useModule() {
           type: 'alert',
           confirmFn: () => {
             canvas.remove(...copyModules)
-            canvas.renderAll()
+            canvas.requestRenderAll()
+            recalculateAllModulesCoords(surfaceId)
           },
         })
       } else {
         surface.set({ modules: [...surface.modules, ...copyModules] })
+        recalculateAllModulesCoords(surfaceId)
       }
     })
 
@@ -333,6 +351,7 @@ export function useModule() {
       }
     })
 
+    const surfaceId = modules[0].surfaceId
     if (isWarning) {
       swalFire({
         title: getMessage('can.not.copy.module'),
@@ -340,11 +359,13 @@ export function useModule() {
         type: 'alert',
         confirmFn: () => {
           canvas.remove(...copyModules)
-          canvas.renderAll()
+          canvas.requestRenderAll()
+          recalculateAllModulesCoords(surfaceId)
         },
       })
     } else {
       moduleSetupSurface.set({ modules: [...moduleSetupSurface.modules, ...copyModules] })
+      recalculateAllModulesCoords(surfaceId)
     }
     setModuleStatisticsData()
   }
@@ -426,6 +447,7 @@ export function useModule() {
     })
     activeModule.set({ strokeWidth: 3 })
 
+    const surfaceId = activeModule.surfaceId
     if (isWarning) {
       swalFire({
         title: getMessage('can.not.copy.module'),
@@ -433,12 +455,14 @@ export function useModule() {
         type: 'alert',
         confirmFn: () => {
           canvas.remove(...copyModules)
-          canvas.renderAll()
+          canvas.requestRenderAll()
+          recalculateAllModulesCoords(surfaceId)
         },
       })
     } else {
       moduleSetupSurface.set({ modules: [...moduleSetupSurface.modules, ...copyModules] })
       setModuleStatisticsData()
+      recalculateAllModulesCoords(surfaceId)
     }
   }
 
@@ -477,6 +501,7 @@ export function useModule() {
         }
         if (width === -1) width = module.left - activeModule.left
         module.set({ left: module.left - width })
+        module.dirty = true
         module.setCoords()
         canvas.renderAll()
         if (isOverlapOtherModules(module, leftModules) || isOverlapObjects(module, objects) || isOutsideSurface(module, moduleSetupSurface)) {
@@ -484,7 +509,7 @@ export function useModule() {
           isWarning = true
         }
       })
-      canvas.renderAll()
+      canvas.requestRenderAll()
       targetModules = rightModules
     } else if (type === MODULE_REMOVE_TYPE.RIGHT) {
       leftModules.forEach((module) => {
@@ -495,6 +520,7 @@ export function useModule() {
         }
         if (width === -1) width = activeModule.left - module.left
         module.set({ left: module.left + width })
+        module.dirty = true
         module.setCoords()
         canvas.renderAll()
         if (isOverlapOtherModules(module, rightModules) || isOverlapObjects(module, objects) || isOutsideSurface(module, moduleSetupSurface)) {
@@ -502,7 +528,7 @@ export function useModule() {
           isWarning = true
         }
       })
-      canvas.renderAll()
+      canvas.requestRenderAll()
       targetModules = leftModules
     } else if (type === MODULE_REMOVE_TYPE.HORIZONTAL_SIDE) {
       const sideModules = [...leftModules, ...rightModules]
@@ -514,6 +540,7 @@ export function useModule() {
         }
         if (width === -1) width = activeModule.left - module.left
         module.set({ left: module.left + width / 2 })
+        module.dirty = true
         module.setCoords()
         canvas.renderAll()
       })
@@ -526,6 +553,7 @@ export function useModule() {
         }
         if (width === -1) width = module.left - activeModule.left
         module.set({ left: module.left - width / 2 })
+        module.dirty = true
         module.setCoords()
         canvas.renderAll()
       })
@@ -547,6 +575,7 @@ export function useModule() {
       targetModules = sideModules
     }
     canvas.renderAll()
+    const surfaceId = activeModule.surfaceId
     if (isWarning) {
       swalFire({
         title: getMessage('can.not.remove.module'),
@@ -557,17 +586,24 @@ export function useModule() {
           canvas.add(...columnModules)
           targetModules.forEach((module) => {
             module.set({ top: module.originPos.top, left: module.originPos.left, fill: module.originPos.fill })
+            module.dirty = true
             module.setCoords()
           })
-          canvas.renderAll()
+          columnModules.forEach((module) => {
+            module.dirty = true
+            module.setCoords()
+          })
+          canvas.requestRenderAll()
+          recalculateAllModulesCoords(surfaceId)
         },
       })
     } else {
       moduleSetupSurface.modules = moduleSetupSurface.modules.filter(
         (module) => !columnModules.map((copyModule) => copyModule.id).includes(module.id),
       )
+      setModuleStatisticsData()
+      recalculateAllModulesCoords(surfaceId)
     }
-    setModuleStatisticsData()
   }
 
   const moduleRowRemove = (type) => {
@@ -599,6 +635,7 @@ export function useModule() {
         }
         if (height === -1) height = module.top - activeModule.top
         module.set({ top: module.top - height })
+        module.dirty = true
         module.setCoords()
         canvas.renderAll()
         if (isOverlapOtherModules(module, topModules) || isOverlapObjects(module, objects) || isOutsideSurface(module, moduleSetupSurface)) {
@@ -606,7 +643,7 @@ export function useModule() {
           module.set({ fill: 'red' })
         }
       })
-      canvas.renderAll()
+      canvas.requestRenderAll()
       targetModules = bottomModules
     } else if (type === MODULE_REMOVE_TYPE.BOTTOM) {
       topModules.forEach((module) => {
@@ -617,6 +654,7 @@ export function useModule() {
         }
         if (height === -1) height = activeModule.top - module.top
         module.set({ top: module.top + activeModule.height })
+        module.dirty = true
         module.setCoords()
         canvas.renderAll()
         if (isOverlapOtherModules(module, bottomModules) || isOverlapObjects(module, objects) || isOutsideSurface(module, moduleSetupSurface)) {
@@ -624,6 +662,7 @@ export function useModule() {
           module.set({ fill: 'red' })
         }
       })
+      canvas.requestRenderAll()
       targetModules = topModules
     } else if (type === MODULE_REMOVE_TYPE.VERTICAL_SIDE) {
       topModules.forEach((module) => {
@@ -635,6 +674,7 @@ export function useModule() {
         // if (height === -1) height = activeModule.top - module.top
         if (height === -1) height = activeModule.height
         module.set({ top: module.top + height / 2 })
+        module.dirty = true
         module.setCoords()
       })
 
@@ -647,10 +687,11 @@ export function useModule() {
         // if (height === -1) height = module.top - activeModule.top
         if (height === -1) height = activeModule.height
         module.set({ top: module.top - height / 2 })
+        module.dirty = true
         module.setCoords()
       })
 
-      canvas.renderAll()
+      canvas.requestRenderAll()
       const sideModules = [...topModules, ...bottomModules]
       sideModules.forEach((module) => {
         if (
@@ -668,6 +709,7 @@ export function useModule() {
       targetModules = sideModules
     }
     canvas.renderAll()
+    const surfaceId = activeModule.surfaceId
     if (isWarning && type !== MODULE_REMOVE_TYPE.NONE) {
       targetModules.forEach((rect) => rect.set({ fill: 'red' }))
       swalFire({
@@ -679,13 +721,20 @@ export function useModule() {
           canvas.add(...rowModules)
           targetModules.forEach((module) => {
             module.set({ top: module.originPos.top, left: module.originPos.left, fill: module.originPos.fill })
+            module.dirty = true
             module.setCoords()
           })
-          canvas.renderAll()
+          rowModules.forEach((module) => {
+            module.dirty = true
+            module.setCoords()
+          })
+          canvas.requestRenderAll()
+          recalculateAllModulesCoords(surfaceId)
         },
       })
     }
     setModuleStatisticsData()
+    recalculateAllModulesCoords(surfaceId)
   }
 
   const moduleColumnInsert = (type) => {
@@ -756,6 +805,7 @@ export function useModule() {
       module.setCoords()
     })
     canvas.renderAll()
+    const surfaceId = activeModule.surfaceId
     if (isWarning) {
       swalFire({
         title: getMessage('can.not.insert.module'),
@@ -764,16 +814,19 @@ export function useModule() {
         confirmFn: () => {
           targetModules.forEach((module) => {
             module.set({ top: module.originPos.top, left: module.originPos.left, fill: module.originPos.fill })
+            module.dirty = true
             module.setCoords()
           })
           canvas.remove(...copyModules)
-          canvas.renderAll()
+          canvas.requestRenderAll()
+          recalculateAllModulesCoords(surfaceId)
         },
       })
     } else {
       moduleSetupSurface.modules = [...moduleSetupSurface.modules, ...copyModules]
+      setModuleStatisticsData()
+      recalculateAllModulesCoords(surfaceId)
     }
-    setModuleStatisticsData()
   }
 
   const isFixedModule = () => {
@@ -863,6 +916,7 @@ export function useModule() {
     })
     canvas.renderAll()
 
+    const surfaceId = activeModule.surfaceId
     if (isWarning) {
       swalFire({
         title: getMessage('can.not.insert.module'),
@@ -871,16 +925,19 @@ export function useModule() {
         confirmFn: () => {
           targetModules.forEach((module) => {
             module.set({ top: module.originPos.top, left: module.originPos.left, fill: module.originPos.fill })
+            module.dirty = true
             module.setCoords()
           })
           canvas.remove(...copyModules)
-          canvas.renderAll()
+          canvas.requestRenderAll()
+          recalculateAllModulesCoords(surfaceId)
         },
       })
     } else {
       moduleSetupSurface.modules = [...moduleSetupSurface.modules, ...copyModules]
+      setModuleStatisticsData()
+      recalculateAllModulesCoords(surfaceId)
     }
-    setModuleStatisticsData()
   }
 
   const alignModule = (type, surfaceArray) => {
@@ -924,6 +981,7 @@ export function useModule() {
         }
       })
       canvas.renderAll()
+      const surfaceId = surface.id
       if (isWarning) {
         swalFire({
           title: getMessage('can.not.align.module'),
@@ -932,11 +990,15 @@ export function useModule() {
           confirmFn: () => {
             modules.forEach((module) => {
               module.set({ top: module.originPos.top, left: module.originPos.left, fill: module.originPos.fill })
+              module.dirty = true
               module.setCoords()
             })
-            canvas.renderAll()
+            canvas.requestRenderAll()
+            recalculateAllModulesCoords(surfaceId)
           },
         })
+      } else {
+        recalculateAllModulesCoords(surfaceId)
       }
     })
   }
@@ -964,6 +1026,7 @@ export function useModule() {
     canvas.remove(activeModule)
     canvas.renderAll()
     setModuleStatisticsData()
+    recalculateAllModulesCoords(activeModule.surfaceId)
   }
 
   const moduleRoofRemove = (surfaceArray) => {
@@ -1049,6 +1112,38 @@ export function useModule() {
     removeTrestleMaterials()
   }
 
+  /**
+   * 모든 모듈의 좌표를 재계산
+   * 열/단 삭제, 복사, 추가 후 호출하여 선택 영역(bounding box)을 업데이트
+   * @param {string} surfaceId - 특정 surface의 모듈만 재계산 (선택적)
+   */
+  const recalculateAllModulesCoords = (surfaceId = null) => {
+    if (!canvas) return
+
+    const modules = canvas
+      .getObjects()
+      .filter((obj) => obj.name === POLYGON_TYPE.MODULE)
+      .filter((obj) => (surfaceId ? obj.surfaceId === surfaceId : true))
+
+    // 모듈의 캐시를 초기화하고 좌표 재계산
+    modules.forEach((module) => {
+      // Fabric.js 내부 캐시 초기화
+      delete module.oCoords
+      delete module.aCoords
+      delete module.lineCoords
+      delete module.__corner
+      delete module.matrixCache
+      delete module.ownMatrixCache
+
+      // dirty 플래그 설정 및 좌표 재계산
+      module.dirty = true
+      module.setCoords()
+    })
+
+    // 렌더링
+    canvas.renderAll()
+  }
+
   return {
     moduleMove,
     moduleMultiMove,
@@ -1063,5 +1158,6 @@ export function useModule() {
     modulesRemove,
     moduleRoofRemove,
     alignModule,
+    recalculateAllModulesCoords,
   }
 }
diff --git a/src/hooks/module/useModuleBasicSetting.js b/src/hooks/module/useModuleBasicSetting.js
index d72d66fc..f298c916 100644
--- a/src/hooks/module/useModuleBasicSetting.js
+++ b/src/hooks/module/useModuleBasicSetting.js
@@ -123,6 +123,7 @@ export function useModuleBasicSetting(tabNum) {
         .getObjects()
         .filter((roof) => roof.name === POLYGON_TYPE.ROOF)
         .forEach((roof) => {
+          changeLineType(roof)
           if (!roof.roofMaterial) return
           const roofIndex = roof.roofMaterial.index //지붕의 지붕재의 순번
 
@@ -168,6 +169,61 @@ export function useModuleBasicSetting(tabNum) {
     }
   }, [trestleDetailList])
 
+  const changeLineType = (polygon) => {
+    if (!polygon || !polygon.lines || polygon.lines.length === 0) return
+
+    const direction = polygon.direction
+
+    // 1. 모든 라인을 케라바(GABLE)로 초기화
+    polygon.lines.forEach((line) => {
+      line.attributes = {
+        ...line.attributes,
+        type: LINE_TYPE.WALLLINE.GABLE,
+      }
+    })
+
+    // 방향에 따른 좌표 설정
+    const directionConfig = {
+      south: { coord1: 'y1', coord2: 'y2', findExtreme: Math.max },
+      north: { coord1: 'y1', coord2: 'y2', findExtreme: Math.min },
+      east: { coord1: 'x1', coord2: 'x2', findExtreme: Math.max },
+      west: { coord1: 'x1', coord2: 'x2', findExtreme: Math.min },
+    }
+
+    const config = directionConfig[direction] || directionConfig.south
+    const { coord1, coord2, findExtreme } = config
+
+    // 2. 직선만 필터링 (대각선 제외)
+    // 남/북: y1 === y2 인 경우 수평 직선
+    // 동/서: x1 === x2 인 경우 수직 직선
+    const straightLines = polygon.lines.filter((line) => line[coord1] === line[coord2])
+
+    if (straightLines.length === 0) return
+
+    // 3. 가장 끝에 있는 직선 찾기
+    // 남쪽: 가장 하단 (y값이 가장 큰), 북쪽: 가장 상단 (y값이 가장 작은)
+    // 동쪽: 가장 오른쪽 (x값이 가장 큰), 서쪽: 가장 왼쪽 (x값이 가장 작은)
+    const extremeValue = findExtreme(...straightLines.map((line) => line[coord1]))
+    const eavesLines = straightLines.filter((line) => line[coord1] === extremeValue)
+
+    // 4. 직선에 대해 타입 설정
+    straightLines.forEach((line) => {
+      if (eavesLines.includes(line)) {
+        // 가장 끝에 있는 직선은 eaves
+        line.attributes = {
+          ...line.attributes,
+          type: LINE_TYPE.WALLLINE.EAVES,
+        }
+      } else {
+        // 나머지 직선은 ridge
+        line.attributes = {
+          ...line.attributes,
+          type: LINE_TYPE.SUBLINE.RIDGE,
+        }
+      }
+    })
+  }
+
   const roofOutlineColor = (roofIndex) => {
     if (roofIndex === 1) {
       return '#FFC000'
diff --git a/src/locales/ja.json b/src/locales/ja.json
index e738ebaa..7fb83f4e 100644
--- a/src/locales/ja.json
+++ b/src/locales/ja.json
@@ -134,6 +134,7 @@
   "modal.module.basic.settting.module.error10": "棟側の配置領域の値を{0} mm以上に変更してください。\n(屋根材: {1})",
   "modal.module.basic.settting.module.error11": "ケラバ側の配置領域の値を{0} mm以上に変更してください。\n(屋根材: {1})",
   "modal.module.basic.settting.module.error12": "施工方法を選択してください。\n(屋根材: {0})",
+  "module.size.validation.rack.error": "モジュール配置が不正です。 正しく配置し直してください。",
   "modal.module.basic.setting.module.placement": "モジュールの配置",
   "modal.module.basic.setting.module.placement.select.fitting.type": "設置形態を選択してください。",
   "modal.module.basic.setting.module.placement.waterfowl.arrangement": "千鳥配置",
diff --git a/src/locales/ko.json b/src/locales/ko.json
index bed23c44..4d237fd6 100644
--- a/src/locales/ko.json
+++ b/src/locales/ko.json
@@ -134,6 +134,7 @@
   "modal.module.basic.settting.module.error10": "용마루쪽 값은 {0}mm 이상이어야 합니다.\n(지붕재: {1})",
   "modal.module.basic.settting.module.error11": "케라바쪽 값은 {0}mm 이상이어야 합니다.\n(지붕재: {1})",
   "modal.module.basic.settting.module.error12": "시공법을 선택해주세요.\n(지붕재: {0})",
+  "module.size.validation.rack.error": "모듈 배치가 잘못되었습니다. 올바르게 다시 배치해 주세요.",
   "modal.module.basic.setting.module.placement": "모듈 배치",
   "modal.module.basic.setting.module.placement.select.fitting.type": "설치형태를 선택합니다.",
   "modal.module.basic.setting.module.placement.waterfowl.arrangement": "물떼새 배치",