diff --git a/src/hooks/option/useCanvasSetting.js b/src/hooks/option/useCanvasSetting.js
index 072a2987..d6cc0e2b 100644
--- a/src/hooks/option/useCanvasSetting.js
+++ b/src/hooks/option/useCanvasSetting.js
@@ -179,7 +179,7 @@ export function useCanvasSetting(executeEffect = true) {
       layout: ['ROOF_ID_SLATE', 'ROOF_ID_SINGLE'].includes(item.roofMatlCd) ? ROOF_MATERIAL_LAYOUT.STAIRS : ROOF_MATERIAL_LAYOUT.PARALLEL,
       hajebichi: item.roofPchBase && parseInt(item.roofPchBase),
       pitch: item.inclBase ? parseInt(item.inclBase) : 4,
-      angle: getDegreeByChon(item.inclBase ? parseInt(item.inclBase): 4) //item.angle ? parseInt(item.angle) : 21.8,
+      angle: getDegreeByChon(item.inclBase ? parseInt(item.inclBase) : 4), //item.angle ? parseInt(item.angle) : 21.8,
     }))
     setRoofMaterials(roofLists)
     return roofLists
@@ -231,8 +231,9 @@ export function useCanvasSetting(executeEffect = true) {
         setPolygonLinesActualSize(roof)
       })
       changeCorridorDimensionText()
+      canvas.renderAll()
     }
-  }, [corridorDimension])
+  }, [corridorDimension, canvasSetting])
 
   useEffect(() => {
     if (!executeEffect) {
diff --git a/src/hooks/useLine.js b/src/hooks/useLine.js
index 3e1d72e6..0d678afa 100644
--- a/src/hooks/useLine.js
+++ b/src/hooks/useLine.js
@@ -168,6 +168,9 @@ export const useLine = () => {
    * @param pitch
    */
   const setActualSize = (line, direction, pitch = globalPitch) => {
+    if (line.attributes.isCalculated) {
+      return
+    }
     const { x1, y1, x2, y2 } = line
 
     const isHorizontal = y1 === y2
@@ -209,7 +212,11 @@ export const useLine = () => {
       }
     }
 
-    line.attributes = { ...line.attributes, actualSize: Number(line.attributes.actualSize.toFixed(0)) }
+    line.attributes = {
+      ...line.attributes,
+      actualSize: Number(line.attributes.actualSize.toFixed(0)),
+      isCalculated: true,
+    }
   }
 
   return {
diff --git a/src/hooks/usePolygon.js b/src/hooks/usePolygon.js
index b862047a..cca65475 100644
--- a/src/hooks/usePolygon.js
+++ b/src/hooks/usePolygon.js
@@ -973,7 +973,6 @@ export const usePolygon = () => {
     })
 
     canvas.renderAll()
-
     /*polygonLines.forEach((line) => {
       line.set({ strokeWidth: 10 })
       canvas.add(line)
@@ -1043,16 +1042,25 @@ export const usePolygon = () => {
           name: 'newLine',
         })
 
+        // 두 라인 중 큰 길이로 통일
+        const length1 = Math.round(Math.hypot(newLine1.x1 - newLine1.x2, newLine1.y1 - newLine1.y2)) * 10
+        const length2 = Math.round(Math.hypot(newLine2.x1 - newLine2.x2, newLine2.y1 - newLine2.y2)) * 10
+        const maxLength = Math.max(length1, length2)
+        const unifiedPlaneSize = line.attributes.planeSize ?? maxLength
+        const unifiedActualSize = line.attributes.actualSize ?? maxLength
+
         newLine1.attributes = {
           ...line.attributes,
-          planeSize: Math.round(Math.hypot(newLine1.x1 - newLine1.x2, newLine1.y1 - newLine1.y2)) * 10,
-          actualSize: Math.round(Math.hypot(newLine1.x1 - newLine1.x2, newLine1.y1 - newLine1.y2)) * 10,
+          planeSize: unifiedPlaneSize,
+          actualSize: unifiedActualSize,
         }
+        newLine1.length = maxLength
         newLine2.attributes = {
           ...line.attributes,
-          planeSize: Math.round(Math.hypot(newLine2.x1 - newLine2.x2, newLine2.y1 - newLine2.y2)) * 10,
-          actualSize: Math.round(Math.hypot(newLine2.x1 - newLine2.x2, newLine2.y1 - newLine2.y2)) * 10,
+          planeSize: unifiedPlaneSize,
+          actualSize: unifiedActualSize,
         }
+        newLine2.length = maxLength
 
         newLines.push(newLine1, newLine2)
         divideLines.splice(i, 1) // 기존 line 제거
@@ -1071,11 +1079,13 @@ export const usePolygon = () => {
             name: 'newLine',
           })
 
+          const calcLength = Math.round(Math.hypot(newLine.x1 - newLine.x2, newLine.y1 - newLine.y2)) * 10
           newLine.attributes = {
             ...line.attributes,
-            planeSize: Math.round(Math.hypot(newLine.x1 - newLine.x2, newLine.y1 - newLine.y2)) * 10,
-            actualSize: Math.round(Math.hypot(newLine.x1 - newLine.x2, newLine.y1 - newLine.y2)) * 10,
+            planeSize: line.attributes.planeSize ?? calcLength,
+            actualSize: line.attributes.actualSize ?? calcLength,
           }
+          newLine.length = line.attributes.planeSize ?? calcLength
 
           newLines.push(newLine)
           currentPoint = minDistancePoint
@@ -1089,11 +1099,13 @@ export const usePolygon = () => {
           attributes: line.attributes,
           name: 'newLine',
         })
+        const lastCalcLength = Math.round(Math.hypot(newLine.x1 - newLine.x2, newLine.y1 - newLine.y2)) * 10
         newLine.attributes = {
           ...line.attributes,
-          planeSize: Math.round(Math.hypot(newLine.x1 - newLine.x2, newLine.y1 - newLine.y2)) * 10,
-          actualSize: Math.round(Math.hypot(newLine.x1 - newLine.x2, newLine.y1 - newLine.y2)) * 10,
+          planeSize: line.attributes.planeSize ?? lastCalcLength,
+          actualSize: line.attributes.actualSize ?? lastCalcLength,
         }
+        newLine.length = line.attributes.planeSize ?? lastCalcLength
 
         newLines.push(newLine)
         divideLines.splice(i, 1) // 기존 line 제거
@@ -1946,23 +1958,33 @@ export const usePolygon = () => {
         const line2 = allRoofLines[j]
         const diff = Math.abs(line1.length - line2.length)
         if (diff > 0 && diff <= 2) {
-          const minLength = Math.min(line1.length, line2.length)
-          line1.setLengthByValue(minLength * 10)
-          line2.setLengthByValue(minLength * 10)
+          const maxLength = Math.max(line1.length, line2.length)
+          line1.setLengthByValue(maxLength * 10)
+          line2.setLengthByValue(maxLength * 10)
+          // attributes도 통일
+          const maxPlaneSize = Math.max(line1.attributes.planeSize || 0, line2.attributes.planeSize || 0)
+          const maxActualSize = Math.max(line1.attributes.actualSize || 0, line2.attributes.actualSize || 0)
+          line1.attributes.planeSize = maxPlaneSize
+          line1.attributes.actualSize = maxActualSize
+          line2.attributes.planeSize = maxPlaneSize
+          line2.attributes.actualSize = maxActualSize
         }
       }
     }
 
     polygon.lines.forEach((line, index) => {
+      if (line.attributes.isCalculated) {
+        return
+      }
       //text 와 planSize 및 actualSize가 안맞는 문제
-      const nextText = polygon?.texts?.[index]?.text
+      /*const nextText = polygon?.texts?.[index]?.text
       const nextPlaneSize = Number(nextText)
-      if (nextText != null && nextText !== '' && Number.isFinite(nextPlaneSize) ) {
-        if(line.attributes.actualSize !== nextPlaneSize && line.attributes.planeSize !== nextPlaneSize) {
+      if (nextText != null && nextText !== '' && Number.isFinite(nextPlaneSize)) {
+        if (line.attributes.actualSize !== nextPlaneSize && line.attributes.planeSize !== nextPlaneSize) {
           line.attributes.planeSize = nextPlaneSize
         }
+      }*/
 
-      }
       setActualSize(line, polygon.direction, +polygon.roofMaterial?.pitch)
     })