diff --git a/frontend/src/App.css b/frontend/src/App.css
index 9d9188e..f3d8c96 100644
--- a/frontend/src/App.css
+++ b/frontend/src/App.css
@@ -187,6 +187,7 @@ html.theme-blue {
   padding: 0 12px;
   gap: 4px;
   z-index: 200;
+  position: relative;
 }
 
 /* 로고 */
@@ -227,6 +228,85 @@ html.theme-blue {
   flex: 1;
   min-width: 0;
 }
+.tmb-nav--groups {
+  flex: 0 1 auto;
+  min-width: 0;
+}
+.tmb-nav-group {
+  position: relative;
+  flex-shrink: 0;
+}
+.tmb-nav-group-btn {
+  padding-right: 8px;
+}
+.tmb-nav-group-btn--open {
+  background: var(--bg4);
+  color: var(--text);
+}
+.tmb-nav-chevron {
+  display: inline-flex;
+  align-items: center;
+  opacity: 0.65;
+  margin-left: 1px;
+  transition: transform 0.15s ease;
+}
+.tmb-nav-chevron--open {
+  transform: rotate(180deg);
+}
+.tmb-nav-dropdown {
+  position: absolute;
+  top: calc(100% + 6px);
+  left: 0;
+  min-width: 168px;
+  padding: 4px;
+  background: var(--bg2);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
+  z-index: 400;
+}
+.tmb-nav-dropdown-item {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  width: 100%;
+  min-height: 36px;
+  padding: 0 10px;
+  border: none;
+  border-radius: 6px;
+  background: none;
+  color: var(--text2);
+  font-size: 13px;
+  font-weight: 500;
+  text-align: left;
+  cursor: pointer;
+  transition: background 0.12s, color 0.12s;
+}
+.tmb-nav-dropdown-item:hover {
+  background: var(--bg4);
+  color: var(--text);
+}
+.tmb-nav-dropdown-item--active {
+  background: rgba(var(--accent-rgb, 122, 162, 247), 0.12);
+  color: var(--accent);
+}
+.app.dark  .tmb-nav-dropdown-item--active { background: rgba(122, 162, 247, 0.13); }
+.app.blue  .tmb-nav-dropdown-item--active { background: rgba(94, 181, 255, 0.13); }
+.app.light .tmb-nav-dropdown-item--active { background: rgba(25, 118, 210, 0.10); }
+.tmb-nav-dropdown-icon {
+  display: flex;
+  align-items: center;
+  flex-shrink: 0;
+  opacity: 0.85;
+}
+.tmb-nav-dropdown-label {
+  flex: 1;
+  white-space: nowrap;
+}
+.tmb-notify-badge--dropdown {
+  position: static;
+  margin-left: auto;
+}
 .tmb-nav-btn {
   position: relative; /* 알림 뱃지 absolute 기준점 */
   display: inline-flex;
@@ -269,6 +349,7 @@ html.theme-blue {
   align-items: center;
   gap: 0;
   flex-shrink: 0;
+  margin-left: auto;
 }
 
 /* 테마 버튼 */
@@ -12878,20 +12959,24 @@ html.theme-light .tam-disclaimer     { color: #90a4ae; }
 }
 .app--mobile .top-menubar::-webkit-scrollbar { display: none; }
 .app--mobile .tmb-logo-text { display: none; }
-.app--mobile .tmb-nav {
+.app--mobile .tmb-nav--groups {
   flex: 1;
   min-width: 0;
   overflow-x: auto;
   -webkit-overflow-scrolling: touch;
   scrollbar-width: none;
 }
-.app--mobile .tmb-nav::-webkit-scrollbar { display: none; }
-.app--mobile .tmb-nav-btn {
-  flex-shrink: 0;
-  padding: 6px 10px;
+.app--mobile .tmb-nav-group-btn .tmb-nav-label {
+  display: inline;
   font-size: 11px;
 }
-.app--mobile .tmb-nav-label { display: none; }
+.app--mobile .tmb-nav-dropdown {
+  min-width: 152px;
+}
+.app--mobile .tmb-nav-dropdown-item {
+  min-height: 40px;
+  font-size: 12px;
+}
 .app--mobile .tmb-theme-label,
 .app--mobile .tmb-login-btn span { display: none; }
 .app--mobile .tmb-right { flex-shrink: 0; }
diff --git a/frontend/src/components/TopMenuBar.tsx b/frontend/src/components/TopMenuBar.tsx
index c4b528a..9116de6 100644
--- a/frontend/src/components/TopMenuBar.tsx
+++ b/frontend/src/components/TopMenuBar.tsx
@@ -2,15 +2,16 @@
  * 최상단 글로벌 메뉴바
  *
  * 레이아웃:
- *  [로고] | [대시보드] [실시간차트] [전략편집기] … | [테마토글] [로그인]
+ *  [로고] | [그룹메뉴 ▾] … | [테마토글] [로그인]
  */
-import React, { memo, useCallback, useEffect, useState } from 'react';
+import React, { memo, useEffect, useState } from 'react';
 import type { Theme } from '../types';
 import type { AuthSession } from '../utils/auth';
 import type { TradeAlertPopupLayout, TradeAlertPopupPosition } from '../utils/tradeAlertPopupLayout';
 import { canAccessMenu } from '../utils/permissions';
 import { isDesktop } from '../utils/platform';
 import DesktopUpdateModal from './DesktopUpdateModal';
+import TopMenuBarNavGroups from './TopMenuBarNavGroups';
 
 export type MenuPage = 'dashboard' | 'chart' | 'paper' | 'virtual' | 'trend-search' | 'verification-board' | 'strategy' | 'strategy-editor' | 'strategy-evaluation' | 'backtest' | 'analysis-report' | 'notifications' | 'settings' | 'widget-dashboard';
 
@@ -244,6 +245,34 @@ const MENU_ITEMS: { page: MenuPage; label: string; icon: React.ReactNode }[] = [
   { page: 'verification-board', label: '검증게시판', icon: <IcVerificationBoard /> },
 ];
 
+/** 기능별 그룹 — 클릭 시 하단 드롭다운 */
+const MENU_GROUPS = [
+  {
+    id: 'home',
+    label: '홈·분석',
+    icon: <IcDashboard />,
+    pages: ['dashboard', 'widget-dashboard', 'analysis-report'] as MenuPage[],
+  },
+  {
+    id: 'trading',
+    label: '차트·매매',
+    icon: <IcChart />,
+    pages: ['chart', 'paper', 'virtual', 'trend-search'] as MenuPage[],
+  },
+  {
+    id: 'strategy',
+    label: '전략',
+    icon: <IcStrategyEditor />,
+    pages: ['strategy-editor', 'strategy-evaluation', 'backtest'] as MenuPage[],
+  },
+  {
+    id: 'system',
+    label: '알림·설정',
+    icon: <IcSettings />,
+    pages: ['notifications', 'verification-board', 'settings'] as MenuPage[],
+  },
+];
+
 export const TopMenuBar = memo(function TopMenuBar({
   activePage, theme, onPage, onTheme,
   tradeNotifyUnread = 0,
@@ -293,28 +322,14 @@ export const TopMenuBar = memo(function TopMenuBar({
 
       <div className="tmb-divider" />
 
-      {/* 내비게이션 메뉴 */}
-      <nav className="tmb-nav">
-        {visibleItems.map(({ page, label, icon }, index) => (
-          <React.Fragment key={page}>
-            {index > 0 && <span className="tmb-divider tmb-divider--nav" aria-hidden="true" />}
-            <button
-              type="button"
-              className={`tmb-nav-btn ${activePage === page ? 'tmb-nav-btn--active' : ''}`}
-              onClick={() => onPage(page)}
-              onMouseEnter={page === 'chart' ? () => { void import('../chart/ChartWorkspaceRoot'); } : undefined}
-            >
-              <span className="tmb-nav-icon">{icon}</span>
-              <span className="tmb-nav-label">{label}</span>
-              {page === 'notifications' && tradeNotifyUnread > 0 && (
-                <span className="tmb-notify-badge tmb-notify-badge--nav">
-                  {tradeNotifyUnread > 99 ? '99+' : tradeNotifyUnread}
-                </span>
-              )}
-            </button>
-          </React.Fragment>
-        ))}
-      </nav>
+      {/* 기능별 그룹 메뉴 */}
+      <TopMenuBarNavGroups
+        activePage={activePage}
+        items={visibleItems}
+        groups={MENU_GROUPS}
+        onPage={onPage}
+        tradeNotifyUnread={tradeNotifyUnread}
+      />
 
       <span className="tmb-divider" aria-hidden="true" />
 
diff --git a/frontend/src/components/TopMenuBarNavGroups.tsx b/frontend/src/components/TopMenuBarNavGroups.tsx
new file mode 100644
index 0000000..3ad7b46
--- /dev/null
+++ b/frontend/src/components/TopMenuBarNavGroups.tsx
@@ -0,0 +1,148 @@
+/**
+ * TopMenuBar — 기능별 그룹 메뉴 + 하단 드롭다운
+ */
+import React, { memo, useCallback, useEffect, useMemo, useRef, useState } from 'react';
+import type { MenuPage } from './TopMenuBar';
+
+export type MenuItemDef = { page: MenuPage; label: string; icon: React.ReactNode };
+
+type MenuGroupDef = {
+  id: string;
+  label: string;
+  icon: React.ReactNode;
+  pages: MenuPage[];
+};
+
+const IcChevron = () => (
+  <svg width="10" height="10" viewBox="0 0 10 10" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" aria-hidden>
+    <polyline points="2,3.5 5,6.5 8,3.5" />
+  </svg>
+);
+
+interface Props {
+  activePage: MenuPage;
+  items: MenuItemDef[];
+  groups: MenuGroupDef[];
+  onPage: (page: MenuPage) => void;
+  tradeNotifyUnread?: number;
+}
+
+export const TopMenuBarNavGroups = memo(function TopMenuBarNavGroups({
+  activePage,
+  items,
+  groups,
+  onPage,
+  tradeNotifyUnread = 0,
+}: Props) {
+  const [openGroupId, setOpenGroupId] = useState<string | null>(null);
+  const navRef = useRef<HTMLElement>(null);
+
+  const itemByPage = useMemo(() => {
+    const map = new Map<MenuPage, MenuItemDef>();
+    for (const item of items) map.set(item.page, item);
+    return map;
+  }, [items]);
+
+  const visibleGroups = useMemo(() => groups
+    .map(group => ({
+      ...group,
+      items: group.pages
+        .map(page => itemByPage.get(page))
+        .filter((item): item is MenuItemDef => Boolean(item)),
+    }))
+    .filter(group => group.items.length > 0), [groups, itemByPage]);
+
+  const closeDropdown = useCallback(() => setOpenGroupId(null), []);
+
+  useEffect(() => {
+    if (!openGroupId) return;
+    const onDoc = (e: MouseEvent) => {
+      if (navRef.current && !navRef.current.contains(e.target as Node)) {
+        closeDropdown();
+      }
+    };
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') closeDropdown();
+    };
+    document.addEventListener('mousedown', onDoc);
+    document.addEventListener('keydown', onKey);
+    return () => {
+      document.removeEventListener('mousedown', onDoc);
+      document.removeEventListener('keydown', onKey);
+    };
+  }, [openGroupId, closeDropdown]);
+
+  useEffect(() => {
+    closeDropdown();
+  }, [activePage, closeDropdown]);
+
+  const handleSelect = (page: MenuPage) => {
+    if (page === 'chart') {
+      void import('../chart/ChartWorkspaceRoot');
+    }
+    onPage(page);
+    closeDropdown();
+  };
+
+  return (
+    <nav className="tmb-nav tmb-nav--groups" ref={navRef} aria-label="주요 메뉴">
+      {visibleGroups.map((group, index) => {
+        const isOpen = openGroupId === group.id;
+        const isActive = group.items.some(item => item.page === activePage);
+        const groupBadge = group.items.some(item => item.page === 'notifications') && tradeNotifyUnread > 0
+          ? tradeNotifyUnread
+          : 0;
+
+        return (
+          <React.Fragment key={group.id}>
+            {index > 0 && <span className="tmb-divider tmb-divider--nav" aria-hidden="true" />}
+            <div className={`tmb-nav-group${isOpen ? ' tmb-nav-group--open' : ''}`}>
+              <button
+                type="button"
+                className={`tmb-nav-btn tmb-nav-group-btn${isActive ? ' tmb-nav-btn--active' : ''}${isOpen ? ' tmb-nav-group-btn--open' : ''}`}
+                aria-expanded={isOpen}
+                aria-haspopup="menu"
+                onClick={() => setOpenGroupId(prev => (prev === group.id ? null : group.id))}
+              >
+                <span className="tmb-nav-icon">{group.icon}</span>
+                <span className="tmb-nav-label">{group.label}</span>
+                <span className={`tmb-nav-chevron${isOpen ? ' tmb-nav-chevron--open' : ''}`}>
+                  <IcChevron />
+                </span>
+                {groupBadge > 0 && (
+                  <span className="tmb-notify-badge tmb-notify-badge--nav">
+                    {groupBadge > 99 ? '99+' : groupBadge}
+                  </span>
+                )}
+              </button>
+
+              {isOpen && (
+                <div className="tmb-nav-dropdown" role="menu">
+                  {group.items.map(item => (
+                    <button
+                      key={item.page}
+                      type="button"
+                      role="menuitem"
+                      className={`tmb-nav-dropdown-item${activePage === item.page ? ' tmb-nav-dropdown-item--active' : ''}`}
+                      onClick={() => handleSelect(item.page)}
+                    >
+                      <span className="tmb-nav-dropdown-icon">{item.icon}</span>
+                      <span className="tmb-nav-dropdown-label">{item.label}</span>
+                      {item.page === 'notifications' && tradeNotifyUnread > 0 && (
+                        <span className="tmb-notify-badge tmb-notify-badge--dropdown">
+                          {tradeNotifyUnread > 99 ? '99+' : tradeNotifyUnread}
+                        </span>
+                      )}
+                    </button>
+                  ))}
+                </div>
+              )}
+            </div>
+          </React.Fragment>
+        );
+      })}
+    </nav>
+  );
+});
+
+export default TopMenuBarNavGroups;