diff --git a/app/game-frontend/src/components/main/MapCityBasic.vue b/app/game-frontend/src/components/main/MapCityBasic.vue
new file mode 100644
index 0000000..708330f
--- /dev/null
+++ b/app/game-frontend/src/components/main/MapCityBasic.vue
@@ -0,0 +1,76 @@
+<script setup lang="ts">
+interface MapCityView {
+    id: number;
+    name: string;
+    level: number;
+    state: number;
+    nationId: number;
+    nationName: string;
+    color: string;
+    x: number;
+    y: number;
+    isCapital: boolean;
+    isMyCity: boolean;
+}
+
+const props = defineProps<{
+    city: MapCityView;
+    showName: boolean;
+}>();
+
+const emit = defineEmits<{
+    (event: 'hover', cityId: number): void;
+    (event: 'leave'): void;
+}>();
+</script>
+
+<template>
+    <div
+        class="map-city"
+        :class="{ mine: props.city.isMyCity }"
+        :style="{ left: `${props.city.x}px`, top: `${props.city.y}px` }"
+        @mouseenter="emit('hover', props.city.id)"
+        @mouseleave="emit('leave')"
+    >
+        <div class="city-dot" :style="{ backgroundColor: props.city.color }">
+            <span v-if="props.city.isCapital" class="capital" />
+        </div>
+        <div v-if="props.showName" class="city-name">{{ props.city.name }}</div>
+    </div>
+</template>
+
+<style scoped>
+.map-city {
+    position: absolute;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: 2px;
+    transform: translate(-50%, -50%);
+    font-size: 0.65rem;
+    color: rgba(232, 221, 196, 0.8);
+}
+
+.city-dot {
+    width: 12px;
+    height: 12px;
+    border: 1px solid rgba(232, 221, 196, 0.6);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.capital {
+    width: 6px;
+    height: 6px;
+    background: rgba(232, 221, 196, 0.9);
+}
+
+.map-city.mine .city-dot {
+    box-shadow: 0 0 0 2px rgba(201, 164, 90, 0.6);
+}
+
+.city-name {
+    white-space: nowrap;
+}
+</style>
diff --git a/app/game-frontend/src/components/main/MapCityDetail.vue b/app/game-frontend/src/components/main/MapCityDetail.vue
new file mode 100644
index 0000000..857a861
--- /dev/null
+++ b/app/game-frontend/src/components/main/MapCityDetail.vue
@@ -0,0 +1,91 @@
+<script setup lang="ts">
+interface MapCityView {
+    id: number;
+    name: string;
+    level: number;
+    state: number;
+    nationId: number;
+    nationName: string;
+    color: string;
+    x: number;
+    y: number;
+    isCapital: boolean;
+    isMyCity: boolean;
+}
+
+const props = defineProps<{
+    city: MapCityView;
+    showName: boolean;
+}>();
+
+const emit = defineEmits<{
+    (event: 'hover', cityId: number): void;
+    (event: 'leave'): void;
+}>();
+</script>
+
+<template>
+    <div
+        class="map-city detail"
+        :class="{ mine: props.city.isMyCity }"
+        :style="{ left: `${props.city.x}px`, top: `${props.city.y}px` }"
+        @mouseenter="emit('hover', props.city.id)"
+        @mouseleave="emit('leave')"
+    >
+        <div class="city-card">
+            <div class="header">
+                <span class="dot" :style="{ backgroundColor: props.city.color }" />
+                <span class="name">{{ props.city.name }}</span>
+                <span v-if="props.city.isCapital" class="capital">수도</span>
+            </div>
+            <div class="meta">Lv {{ props.city.level }} · {{ props.city.nationName }}</div>
+        </div>
+    </div>
+</template>
+
+<style scoped>
+.map-city.detail {
+    position: absolute;
+    transform: translate(-50%, -50%);
+    font-size: 0.65rem;
+}
+
+.city-card {
+    border: 1px solid rgba(201, 164, 90, 0.4);
+    background: rgba(16, 16, 16, 0.8);
+    padding: 4px 6px;
+    display: flex;
+    flex-direction: column;
+    gap: 2px;
+}
+
+.header {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+}
+
+.dot {
+    width: 10px;
+    height: 10px;
+    border: 1px solid rgba(232, 221, 196, 0.6);
+}
+
+.name {
+    font-weight: 600;
+    color: rgba(232, 221, 196, 0.9);
+}
+
+.capital {
+    font-size: 0.6rem;
+    color: rgba(232, 221, 196, 0.7);
+}
+
+.meta {
+    color: rgba(232, 221, 196, 0.6);
+}
+
+.map-city.detail.mine .city-card {
+    box-shadow: 0 0 0 1px rgba(201, 164, 90, 0.7);
+}
+</style>
diff --git a/app/game-frontend/src/components/main/MapViewer.vue b/app/game-frontend/src/components/main/MapViewer.vue
index 668dce6..a385a3b 100644
--- a/app/game-frontend/src/components/main/MapViewer.vue
+++ b/app/game-frontend/src/components/main/MapViewer.vue
@@ -1,6 +1,11 @@
 <script setup lang="ts">
 import { computed, ref } from 'vue';
+import { storeToRefs } from 'pinia';
+import { useMediaQuery, useMouseInElement } from '@vueuse/core';
 import SkeletonLines from '../ui/SkeletonLines.vue';
+import MapCityBasic from './MapCityBasic.vue';
+import MapCityDetail from './MapCityDetail.vue';
+import { useMapViewerStore } from '../../stores/mapViewer';
 
 interface MapSummary {
     year: number;
@@ -11,42 +16,80 @@ interface MapSummary {
     myNation?: number | null;
 }
 
+interface CityView {
+    id: number;
+    name: string;
+    level: number;
+    state: number;
+    nationId: number;
+    nationName: string;
+    color: string;
+    region: number;
+    supply: boolean;
+    x: number;
+    y: number;
+    isCapital: boolean;
+    isMyCity: boolean;
+}
+
 const props = defineProps<{
     mapData: MapSummary | null;
     loading: boolean;
 }>();
 
-const showCityName = ref(true);
-const detailMode = ref(false);
+const isWide = useMediaQuery('(min-width: 1024px)');
+const mapStore = useMapViewerStore();
+const { showCityName, detailMode, hoveredCityId } = storeToRefs(mapStore);
+
+const mapArea = ref<HTMLElement | null>(null);
+const { elementX, elementY } = useMouseInElement(mapArea);
 
 const nationById = computed(() => {
-    const map = new Map<number, { name: string; color: string }>();
+    const map = new Map<number, { name: string; color: string; capitalCityId: number }>();
     if (!props.mapData) {
         return map;
     }
     for (const nation of props.mapData.nationList) {
-        const [id, name, color] = nation;
-        map.set(id, { name, color });
+        const [id, name, color, capitalCityId] = nation;
+        map.set(id, {
+            name,
+            color,
+            capitalCityId: capitalCityId ?? 0,
+        });
     }
     return map;
 });
 
-const cityEntries = computed(() => {
+const cityViews = computed<CityView[]>(() => {
     if (!props.mapData) {
         return [];
     }
-    return props.mapData.cityList.map((entry) => {
+
+    const columns = isWide.value ? 12 : 8;
+    const spacing = isWide.value ? 46 : 36;
+
+    return props.mapData.cityList.map((entry, index) => {
         const [id, level, state, nationId, region, supplyFlag] = entry;
         const nation = nationById.value.get(nationId);
+        const column = index % columns;
+        const row = Math.floor(index / columns);
+        const x = column * spacing + 20 + (region % 3) * 6;
+        const y = row * spacing + 20 + (region % 4) * 4;
+
         return {
             id,
+            name: `도시 ${id}`,
             level,
             state,
             nationId,
-            region,
-            supply: supplyFlag > 0,
             nationName: nation?.name ?? '무주',
             color: nation?.color ?? '#444444',
+            region,
+            supply: supplyFlag > 0,
+            x,
+            y,
+            isCapital: nation?.capitalCityId === id,
+            isMyCity: props.mapData?.myCity === id,
         };
     });
 });
@@ -57,6 +100,27 @@ const mapSummary = computed(() => {
     }
     return `${props.mapData.year}년 ${props.mapData.month}월`;
 });
+
+const mapHeight = computed(() => {
+    if (!cityViews.value.length) {
+        return '240px';
+    }
+    const columns = isWide.value ? 12 : 8;
+    const rows = Math.ceil(cityViews.value.length / columns);
+    const spacing = isWide.value ? 46 : 36;
+    return `${rows * spacing + 40}px`;
+});
+
+const hoveredCity = computed(() => {
+    if (!hoveredCityId.value) {
+        return null;
+    }
+    return cityViews.value.find((city) => city.id === hoveredCityId.value) ?? null;
+});
+
+const setHoveredCity = (cityId: number | null) => {
+    mapStore.setHoveredCity(cityId);
+};
 </script>
 
 <template>
@@ -64,10 +128,10 @@ const mapSummary = computed(() => {
         <div class="map-top">
             <div class="map-title">{{ mapSummary }}</div>
             <div class="map-controls">
-                <button class="map-toggle" :class="{ active: showCityName }" @click="showCityName = !showCityName">
+                <button class="map-toggle" :class="{ active: showCityName }" @click="mapStore.toggleCityName">
                     도시명
                 </button>
-                <button class="map-toggle" :class="{ active: detailMode }" @click="detailMode = !detailMode">
+                <button class="map-toggle" :class="{ active: detailMode }" @click="mapStore.toggleDetailMode">
                     상세
                 </button>
             </div>
@@ -79,26 +143,28 @@ const mapSummary = computed(() => {
             지도 데이터를 불러오지 못했습니다.
         </div>
         <div v-else class="map-body">
-            <div class="map-placeholder">
-                <div class="map-placeholder-text">레거시 지도 렌더러 이식 대기</div>
-                <div class="map-meta">
-                    <span>도시 {{ props.mapData.cityList.length }}</span>
-                    <span>세력 {{ props.mapData.nationList.length }}</span>
+            <div ref="mapArea" class="map-area" :style="{ height: mapHeight }">
+                <div class="map-placeholder">지도 렌더러 이식 중</div>
+                <component
+                    :is="detailMode ? MapCityDetail : MapCityBasic"
+                    v-for="city in cityViews"
+                    :key="city.id"
+                    :city="city"
+                    :show-name="showCityName"
+                    @hover="setHoveredCity"
+                    @leave="setHoveredCity(null)"
+                />
+                <div v-if="hoveredCity" class="map-tooltip" :style="{ left: `${elementX + 16}px`, top: `${elementY + 16}px` }">
+                    <div class="tooltip-title">{{ hoveredCity.name }}</div>
+                    <div class="tooltip-body">{{ hoveredCity.nationName }} · Lv {{ hoveredCity.level }}</div>
                 </div>
             </div>
-            <div class="city-list">
-                <div
-                    v-for="city in cityEntries.slice(0, detailMode ? 20 : 10)"
-                    :key="city.id"
-                    class="city-row"
-                    :class="{ mine: props.mapData.myCity === city.id }"
-                >
-                    <span class="nation" :style="{ backgroundColor: city.color }" />
-                    <span class="name">{{ showCityName ? `도시 ${city.id}` : `#${city.id}` }}</span>
-                    <span class="meta">Lv {{ city.level }} · 지역 {{ city.region }}</span>
-                    <span class="state">보급 {{ city.supply ? 'O' : 'X' }}</span>
-                </div>
-                <div v-if="cityEntries.length === 0" class="city-empty">표시할 도시가 없습니다.</div>
+            <div class="map-meta">
+                <span>도시 {{ props.mapData.cityList.length }}</span>
+                <span>세력 {{ props.mapData.nationList.length }}</span>
+            </div>
+            <div class="map-footnote">
+                도시명/좌표 데이터는 추후 서버 API로 치환 예정
             </div>
         </div>
     </div>
@@ -140,22 +206,41 @@ const mapSummary = computed(() => {
 }
 
 .map-body {
-    display: grid;
-    gap: 12px;
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+}
+
+.map-area {
+    position: relative;
+    border: 1px dashed rgba(201, 164, 90, 0.4);
+    background: rgba(16, 16, 16, 0.6);
+    overflow: hidden;
 }
 
 .map-placeholder {
-    border: 1px dashed rgba(201, 164, 90, 0.4);
-    padding: 12px;
-    display: flex;
-    flex-direction: column;
-    gap: 6px;
-    background: rgba(16, 16, 16, 0.6);
+    position: absolute;
+    top: 8px;
+    left: 8px;
+    font-size: 0.7rem;
+    color: rgba(232, 221, 196, 0.6);
 }
 
-.map-placeholder-text {
-    font-size: 0.85rem;
-    color: rgba(232, 221, 196, 0.8);
+.map-tooltip {
+    position: absolute;
+    pointer-events: none;
+    border: 1px solid rgba(201, 164, 90, 0.4);
+    background: rgba(16, 16, 16, 0.9);
+    padding: 4px 6px;
+    font-size: 0.65rem;
+}
+
+.tooltip-title {
+    font-weight: 600;
+}
+
+.tooltip-body {
+    color: rgba(232, 221, 196, 0.6);
 }
 
 .map-meta {
@@ -165,44 +250,9 @@ const mapSummary = computed(() => {
     color: rgba(232, 221, 196, 0.6);
 }
 
-.city-list {
-    display: flex;
-    flex-direction: column;
-    gap: 6px;
-}
-
-.city-row {
-    display: grid;
-    grid-template-columns: 14px 1fr auto auto;
-    gap: 8px;
-    align-items: center;
-    padding: 4px 6px;
-    border: 1px solid rgba(201, 164, 90, 0.2);
-    font-size: 0.75rem;
-}
-
-.city-row.mine {
-    background: rgba(201, 164, 90, 0.15);
-}
-
-.city-row .nation {
-    width: 12px;
-    height: 12px;
-    border: 1px solid rgba(232, 221, 196, 0.6);
-}
-
-.city-row .name {
-    color: rgba(232, 221, 196, 0.9);
-}
-
-.city-row .meta,
-.city-row .state {
-    color: rgba(232, 221, 196, 0.6);
-}
-
-.city-empty {
-    font-size: 0.8rem;
-    color: rgba(232, 221, 196, 0.6);
+.map-footnote {
+    font-size: 0.65rem;
+    color: rgba(232, 221, 196, 0.5);
 }
 
 .map-empty {
diff --git a/app/game-frontend/src/stores/mapViewer.ts b/app/game-frontend/src/stores/mapViewer.ts
new file mode 100644
index 0000000..c946d1a
--- /dev/null
+++ b/app/game-frontend/src/stores/mapViewer.ts
@@ -0,0 +1,26 @@
+import { defineStore } from 'pinia';
+
+interface MapViewerState {
+    showCityName: boolean;
+    detailMode: boolean;
+    hoveredCityId: number | null;
+}
+
+export const useMapViewerStore = defineStore('mapViewer', {
+    state: (): MapViewerState => ({
+        showCityName: true,
+        detailMode: false,
+        hoveredCityId: null,
+    }),
+    actions: {
+        toggleCityName() {
+            this.showCityName = !this.showCityName;
+        },
+        toggleDetailMode() {
+            this.detailMode = !this.detailMode;
+        },
+        setHoveredCity(cityId: number | null) {
+            this.hoveredCityId = cityId;
+        },
+    },
+});
diff --git a/docs/architecture/game-frontend-spa-plan.md b/docs/architecture/game-frontend-spa-plan.md
index 51775c2..a92de8a 100644
--- a/docs/architecture/game-frontend-spa-plan.md
+++ b/docs/architecture/game-frontend-spa-plan.md
@@ -125,13 +125,15 @@
 - 라우트: Public/Login/Join/Main 기본 가드 및 분기 처리
 - 메인 화면 스켈레톤: 지도/명령/장수/도시/국가/메시지 패널 + 반응형 레이아웃 + 실시간 토글 UI
 - API 보강: 게임 API에 `general.me` 추가 (메인 화면 컨텍스트 제공)
+- MapViewer 1차 이식: 지도 토글/툴팁/도시 마커/디테일 모드와 Pinia 상태 연결
 
 ## Next Frontend Tasks
 
 - 게이트웨이 로그인/프로필 선택 플로우 정리 (토큰 전달 방식, 자동 로그인, 쿠키 기반 전환 고려)
 - 공개(Public) 화면 구현: 캐싱된 지도/중원정세/세력일람 + 제한된 장수일람
 - 실시간 업데이트(SSE) 연결 설계 및 메인 화면 토글과 연동
-- 레거시 주요 컴포넌트 이식(MapViewer/CommandSelectForm/MessagePanel 등)
+- MapViewer 데이터 보강: 도시명/좌표 제공 API 및 레거시 맵 렌더링 이식
+- CommandSelectForm/MessagePanel 이식 마무리(예약/전송 플로우 연결)
 - Join/빙의 UI 구현 및 완료 후 상태 갱신(장수 생성 감지)
 - 화면 라우트 매핑 표 및 데이터 계약 문서화
 
diff --git a/docs/architecture/todo.md b/docs/architecture/todo.md
index c73d82f..b8eb198 100644
--- a/docs/architecture/todo.md
+++ b/docs/architecture/todo.md
@@ -22,6 +22,7 @@ Move items into the main docs once they are finalized.
 - [AI suggestion] Implement Public 화면: 캐싱된 지도/중원정세/세력일람 + 제한된 장수일람 API/뷰.
 - [AI suggestion] Define main screen SSE contract + 실시간 동기화 토글 연동 (지도/명령/도시/국가/장수/메시지/동향/기록).
 - [AI suggestion] Port legacy main UI components into `app/game-frontend` (MapViewer, CommandSelectForm, MessagePanel 등).
+- [AI suggestion] Provide map city name/position data for MapViewer (API or scenario export) and replace placeholder layout.
 - [AI suggestion] Implement join/빙의 UI and post-creation refresh flow.
 - [AI suggestion] Build and maintain a legacy-to-SPA route mapping table with data requirements.