diff --git a/apps/cs/app/(with-base-layout)/layout.tsx b/apps/cs/app/(with-base-layout)/layout.tsx
index cbcaee847..dfb290abd 100644
--- a/apps/cs/app/(with-base-layout)/layout.tsx
+++ b/apps/cs/app/(with-base-layout)/layout.tsx
@@ -1,11 +1,18 @@
 "use client";
 
+import { usePathname, useRouter } from "next/navigation";
 import { BaseLayout } from "@common/components/ui";
-
 export default function WithBaseLayout({
   children,
 }: {
   children: React.ReactNode;
 }) {
-  return <BaseLayout>{children}</BaseLayout>;
+  const router = useRouter();
+  const pathname = usePathname();
+
+  return (
+    <BaseLayout currentPath={pathname ?? ""} routeHandler={router.push}>
+      {children}
+    </BaseLayout>
+  );
 }
diff --git a/packages/common/components/src/ui/layout/base.tsx b/packages/common/components/src/ui/layout/base.tsx
index 9dd778e03..b48e2d9d9 100644
--- a/packages/common/components/src/ui/layout/base.tsx
+++ b/packages/common/components/src/ui/layout/base.tsx
@@ -10,9 +10,13 @@ import type { QueryClient } from "@tanstack/react-query";
 export function BaseLayout({
   children,
   queryClient,
+  currentPath,
+  routeHandler,
 }: {
   children: React.ReactNode;
   queryClient?: QueryClient;
+  currentPath?: string;
+  routeHandler?: (path: string) => void;
 }) {
   return (
     <QueryProvider client={queryClient}>
@@ -20,7 +24,7 @@ export function BaseLayout({
         <div className="flex-1">
           <Header />
           <div className="flex h-[calc(100vh-50px)]">
-            <LNB />
+            <LNB currentPath={currentPath} routeHandler={routeHandler} />
             <div className="flex flex-1 flex-col">
               <div className="max-h-[calc(100%-50px)] flex-1 overflow-auto">
                 {children}
diff --git a/packages/common/components/src/ui/lnb/index.tsx b/packages/common/components/src/ui/lnb/index.tsx
index b1a7fe094..197a44a9e 100644
--- a/packages/common/components/src/ui/lnb/index.tsx
+++ b/packages/common/components/src/ui/lnb/index.tsx
@@ -1,7 +1,7 @@
 import { useState } from "react";
 import { useQuery } from "@tanstack/react-query";
 import { ChevronRight } from "lucide-react";
-import { cn } from "../../lib/utils";
+import { cn, setCookie } from "../../lib";
 import { ENDPOINT, SITE_ID } from "../../config";
 import { getMenuList, type MenuItem } from "../../api";
 import {
@@ -19,7 +19,15 @@ import {
 } from "../collapsible";
 import { getParentIds } from "./lib";
 
-export function LNB({ viewOnly }: { viewOnly?: boolean }) {
+export function LNB({
+  viewOnly,
+  currentPath,
+  routeHandler,
+}: {
+  viewOnly?: boolean;
+  currentPath?: string;
+  routeHandler?: (path: string) => void;
+}) {
   const { data: menuList } = useQuery({
     queryKey: [ENDPOINT.CMS_SERVICE.MENU_ROLES],
     queryFn: () => getMenuList(SITE_ID),
@@ -28,14 +36,31 @@ export function LNB({ viewOnly }: { viewOnly?: boolean }) {
 
   const [openMenuIds, setOpenMenuIds] = useState<number[]>([]);
 
+  function isPathMatched(path: string) {
+    return currentPath === path || currentPath?.startsWith(`${path}/`);
+  }
+
   function MenuItem({ item }: { item: MenuItem }) {
+    const isMatched = isPathMatched(item.urlPath);
+
+    const handleClick = () => {
+      setCookie("menu-code-key", item.menuCd.toString());
+      routeHandler?.(item.urlPath);
+    };
+
     if (item.children) {
       return <MenuGroup item={item} />;
     }
 
     return (
       <SidebarMenuItem>
-        <SidebarMenuButton className="h-auto py-4 text-[1.4rem] text-label transition-colors hover:bg-accent">
+        <SidebarMenuButton
+          className={cn(
+            "h-auto py-4 text-[1.4rem] text-label transition-colors hover:bg-accent",
+            isMatched && "bg-accent text-primary",
+          )}
+          onClick={handleClick}
+        >
           <i className={cn("diveicon ml-2", `di-${item.iconNm}`)} />
           {item.menuKornNm}
         </SidebarMenuButton>
@@ -44,7 +69,11 @@ export function LNB({ viewOnly }: { viewOnly?: boolean }) {
   }
 
   function MenuGroup({ item }: { item: MenuItem }) {
-    const isOpen = openMenuIds.includes(item.menuCd);
+    const hasMatchedChild = item.children?.some((child) =>
+      isPathMatched(child.urlPath),
+    );
+
+    const isOpen = openMenuIds.includes(item.menuCd) || hasMatchedChild;
 
     const handleOpenChange = (open: boolean) => {
       if (open) {