diff --git a/.env.development b/.env.development
index 0d44ce67..23ace926 100644
--- a/.env.development
+++ b/.env.development
@@ -15,7 +15,6 @@ NEXT_PUBLIC_CONVERTER_DXF_API_URL="https://v2.convertapi.com/convert/dxf/to/png?
 
 NEXT_PUBLIC_Q_ORDER_AUTO_LOGIN_URL="https://q-order-dev.q-cells.jp/eos/login/autoLogin"
 NEXT_PUBLIC_Q_MUSUBI_AUTO_LOGIN_URL="https://q-musubi-dev.q-cells.jp/qm/login/autoLogin"
-NEXT_PUBLIC_ECONOMIC_SIMULATION_AUTH_URL="https://q-order-dev.q-cells.jp/eos/simulation/auth"
 NEXT_PUBLIC_ECONOMIC_SIMULATION_URL="https://q-order-dev.q-cells.jp/eos/simulation/list"
 
 # 테스트용
diff --git a/.env.localhost b/.env.localhost
index cd3a3245..7762c655 100644
--- a/.env.localhost
+++ b/.env.localhost
@@ -15,7 +15,6 @@ NEXT_PUBLIC_CONVERTER_DXF_API_URL="https://v2.convertapi.com/convert/dxf/to/png?
 
 NEXT_PUBLIC_Q_ORDER_AUTO_LOGIN_URL="http://q-order-stg.q-cells.jp:8120/eos/login/autoLogin"
 NEXT_PUBLIC_Q_MUSUBI_AUTO_LOGIN_URL="http://q-musubi-stg.q-cells.jp:8120/qm/login/autoLogin"
-NEXT_PUBLIC_ECONOMIC_SIMULATION_AUTH_URL="http://q-order-stg.q-cells.jp:8120/eos/simulation/auth"
 NEXT_PUBLIC_ECONOMIC_SIMULATION_URL="http://q-order-stg.q-cells.jp:8120/eos/simulation/list"
 
 # 테스트용
diff --git a/.env.production b/.env.production
index e421b123..3d205afd 100644
--- a/.env.production
+++ b/.env.production
@@ -15,7 +15,6 @@ NEXT_PUBLIC_CONVERTER_DXF_API_URL="https://v2.convertapi.com/convert/dxf/to/png?
 
 NEXT_PUBLIC_Q_ORDER_AUTO_LOGIN_URL="https://q-order.q-cells.jp/eos/login/autoLogin"
 NEXT_PUBLIC_Q_MUSUBI_AUTO_LOGIN_URL="https://q-musubi.q-cells.jp/qm/login/autoLogin"
-NEXT_PUBLIC_ECONOMIC_SIMULATION_AUTH_URL="https://q-order.q-cells.jp/eos/simulation/auth"
 NEXT_PUBLIC_ECONOMIC_SIMULATION_URL="https://q-order.q-cells.jp/eos/simulation/list"
 
 # AWS_REGION="ap-northeast-2"
diff --git a/src/components/header/Header.jsx b/src/components/header/Header.jsx
index dce8e874..5fe0a9ba 100644
--- a/src/components/header/Header.jsx
+++ b/src/components/header/Header.jsx
@@ -27,7 +27,6 @@ import { roofMaterialsAtom } from '@/store/settingAtom'
 import { useMasterController } from '@/hooks/common/useMasterController'
 import { ROOF_MATERIAL_LAYOUT } from '@/components/floor-plan/modal/placementShape/PlacementShapeSetting'
 import { useSwal } from '@/hooks/useSwal'
-import { logger } from '@/util/logger'
 
 export const ToggleonMouse = (e, act, target) => {
   const listWrap = e.target.closest(target)
@@ -174,19 +173,12 @@ export default function Header(props) {
     const { encSaleStoreId, encUserId } = encRes.data
 
     if (!encSaleStoreId || !encUserId) return
-
-    const authRes = await fetch(process.env.NEXT_PUBLIC_ECONOMIC_SIMULATION_AUTH_URL, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ encStoreId: encSaleStoreId, encRegId: encUserId }),
-    })
-
-    if (authRes.ok) {
-      window.open(process.env.NEXT_PUBLIC_ECONOMIC_SIMULATION_URL, 'economicSimulation', `height=${screen.height},width=${screen.width},fullscreen=yes`)
-    } else {
-      const body = await authRes.json()
-      swalFire({ text: body.resultMessage, type: 'error' })
-    }
+    
+    window.open(
+      `${process.env.NEXT_PUBLIC_ECONOMIC_SIMULATION_URL}?authYn=Y&encStoreId=${encodeURIComponent(encSaleStoreId)}&encRegId=${encodeURIComponent(encUserId)}`,
+      'economicSimulation',
+      `height=${screen.height},width=${screen.width},fullscreen=yes`
+    )    
   }
 
   const menus = [