diff --git a/src/hooks/useEvent.js b/src/hooks/useEvent.js
index 3b8924cf..8112bb36 100644
--- a/src/hooks/useEvent.js
+++ b/src/hooks/useEvent.js
@@ -132,7 +132,7 @@ export function useEvent() {
       const roofsPoints = roofs.map((roof) => roof.points).flat()
       roofAdsorptionPoints.current = [...roofsPoints]
 
-      const auxiliaryLines = canvas.getObjects().filter((obj) => obj.name === 'auxiliaryLine' && !obj.isFixed)
+      const auxiliaryLines = canvas.getObjects().filter((obj) => obj.name === 'auxiliaryLine')
       const otherAdsorptionPoints = []
 
       auxiliaryLines.forEach((line1) => {
@@ -179,7 +179,38 @@ export function useEvent() {
 
       const allAuxiliaryLines = canvas.getObjects().filter((obj) => obj.name === 'auxiliaryLine')
 
-      const adsorptionPoints = [
+      allAuxiliaryLines.forEach((aux) => {
+        const roofs = canvas.getObjects().filter((obj) => obj.name === POLYGON_TYPE.ROOF)
+
+        roofs.forEach((roof) => {
+          //지붕과 보조선이 만나는 지점
+          roof.lines.forEach((line) => {
+            const intersectionPoint = calculateIntersection(aux, line)
+            if (intersectionPoint) {
+              intersectionPoints.current.push(intersectionPoint)
+            }
+          })
+
+          //innerLines와 보조선이 만나는 지점
+          roof.innerLines.forEach((line) => {
+            const intersectionPoint = calculateIntersection(aux, line)
+            if (intersectionPoint) {
+              intersectionPoints.current.push(intersectionPoint)
+            }
+          })
+        })
+
+        // outerLines와의 교점
+        const outerLines = canvas.getObjects().filter((obj) => obj.name === 'outerLine')
+        outerLines.forEach((outerLine) => {
+          const intersectionPoint = calculateIntersection(aux, outerLine)
+          if (intersectionPoint) {
+            intersectionPoints.current.push(intersectionPoint)
+          }
+        })
+      })
+
+      let adsorptionPoints = [
         ...getAdsorptionPoints(),
         ...roofAdsorptionPoints.current,
         ...otherAdsorptionPoints,
@@ -200,6 +231,8 @@ export function useEvent() {
         }),
       ]
 
+      adsorptionPoints = removeDuplicatePoints(adsorptionPoints)
+
       if (dotLineGridSetting.LINE || canvas.getObjects().filter((obj) => ['lineGrid', 'tempGrid'].includes(obj.name)).length > 1) {
         const closestLine = getClosestLineGrid(pointer)
 
@@ -451,6 +484,17 @@ export function useEvent() {
     })
   }
 
+  const removeDuplicatePoints = (points) => {
+    const map = new Map()
+    points.forEach((point) => {
+      const key = `${point.x},${point.y}`
+      if (!map.has(key)) {
+        map.set(key, point)
+      }
+    })
+    return Array.from(map.values())
+  }
+
   return {
     addDocumentEventListener,
     addCanvasMouseEventListener,