diff --git a/frontend/lib/registry/pop-components/pop-dashboard/PopDashboardConfig.tsx b/frontend/lib/registry/pop-components/pop-dashboard/PopDashboardConfig.tsx
index 66a56876..b75f9b66 100644
--- a/frontend/lib/registry/pop-components/pop-dashboard/PopDashboardConfig.tsx
+++ b/frontend/lib/registry/pop-components/pop-dashboard/PopDashboardConfig.tsx
@@ -1289,51 +1289,10 @@ function ItemEditor({
                 </Select>
               </div>
 
-              {/* X축 컬럼 */}
-              <div>
-                <Label className="text-xs">X축 컬럼</Label>
-                <Input
-                  value={item.chartConfig?.xAxisColumn ?? ""}
-                  onChange={(e) =>
-                    onUpdate({
-                      ...item,
-                      chartConfig: {
-                        ...item.chartConfig,
-                        chartType: item.chartConfig?.chartType ?? "bar",
-                        xAxisColumn: e.target.value || undefined,
-                      },
-                    })
-                  }
-                  placeholder="groupBy 컬럼명 (비우면 자동)"
-                  className="h-8 text-xs"
-                />
-                <p className="mt-0.5 text-[10px] text-muted-foreground">
-                  그룹핑 컬럼명과 동일하게 입력. 비우면 첫 번째 groupBy 컬럼 사용
-                </p>
-              </div>
-
-              {/* Y축 컬럼 */}
-              <div>
-                <Label className="text-xs">Y축 컬럼</Label>
-                <Input
-                  value={item.chartConfig?.yAxisColumn ?? ""}
-                  onChange={(e) =>
-                    onUpdate({
-                      ...item,
-                      chartConfig: {
-                        ...item.chartConfig,
-                        chartType: item.chartConfig?.chartType ?? "bar",
-                        yAxisColumn: e.target.value || undefined,
-                      },
-                    })
-                  }
-                  placeholder="집계 결과 컬럼명 (비우면 자동)"
-                  className="h-8 text-xs"
-                />
-                <p className="mt-0.5 text-[10px] text-muted-foreground">
-                  집계 결과 컬럼. 비우면 집계 함수 결과를 자동 사용
-                </p>
-              </div>
+              {/* X축/Y축 자동 안내 */}
+              <p className="text-[10px] text-muted-foreground">
+                X축: 그룹핑(X축)에서 선택한 컬럼 자동 적용 / Y축: 집계 결과(value) 자동 적용
+              </p>
             </div>
           )}
 
diff --git a/frontend/lib/registry/pop-components/pop-dashboard/items/ChartItem.tsx b/frontend/lib/registry/pop-components/pop-dashboard/items/ChartItem.tsx
index c1fbd6b6..93f29b1c 100644
--- a/frontend/lib/registry/pop-components/pop-dashboard/items/ChartItem.tsx
+++ b/frontend/lib/registry/pop-components/pop-dashboard/items/ChartItem.tsx
@@ -19,6 +19,7 @@ import {
   XAxis,
   YAxis,
   Tooltip,
+  Legend,
   ResponsiveContainer,
 } from "recharts";
 import type { DashboardItem } from "../../types";
@@ -124,7 +125,7 @@ export function ChartItemComponent({
               />
             </LineChart>
           ) : (
-            /* pie */
+            /* pie - 카테고리명 + 값 라벨 표시 */
             <PieChart>
               <Pie
                 data={rows as Record<string, string | number>[]}
@@ -132,8 +133,14 @@ export function ChartItemComponent({
                 nameKey={xKey}
                 cx="50%"
                 cy="50%"
-                outerRadius="80%"
-                label={containerWidth > 250}
+                outerRadius={containerWidth > 400 ? "70%" : "80%"}
+                label={
+                  containerWidth > 250
+                    ? ({ name, value, percent }: { name: string; value: number; percent: number }) =>
+                        `${name} ${value} (${(percent * 100).toFixed(0)}%)`
+                    : false
+                }
+                labelLine={containerWidth > 250}
               >
                 {rows.map((_, index) => (
                   <Cell
@@ -142,7 +149,15 @@ export function ChartItemComponent({
                   />
                 ))}
               </Pie>
-              <Tooltip />
+              <Tooltip
+                formatter={(value: number, name: string) => [value, name]}
+              />
+              {containerWidth > 300 && (
+                <Legend
+                  wrapperStyle={{ fontSize: 11 }}
+                  iconSize={10}
+                />
+              )}
             </PieChart>
           )}
         </ResponsiveContainer>
diff --git a/frontend/lib/registry/pop-components/pop-dashboard/utils/dataFetcher.ts b/frontend/lib/registry/pop-components/pop-dashboard/utils/dataFetcher.ts
index 4746b69b..c2baaa55 100644
--- a/frontend/lib/registry/pop-components/pop-dashboard/utils/dataFetcher.ts
+++ b/frontend/lib/registry/pop-components/pop-dashboard/utils/dataFetcher.ts
@@ -10,6 +10,7 @@
  * - fetch 직접 사용 금지: 반드시 dashboardApi/dataApi 사용
  */
 
+import { apiClient } from "@/lib/api/client";
 import { dashboardApi } from "@/lib/api/dashboard";
 import { dataApi } from "@/lib/api/data";
 import { tableManagementApi } from "@/lib/api/tableManagement";
@@ -238,19 +239,46 @@ export async function fetchAggregatedData(
     // 집계 또는 조인이 있으면 SQL 직접 실행
     if (config.aggregation || (config.joins && config.joins.length > 0)) {
       const sql = buildAggregationSQL(config);
-      const result = await dashboardApi.executeQuery(sql);
 
-      if (result.rows.length === 0) {
+      // API 호출: apiClient(axios) 우선, dashboardApi(fetch) 폴백
+      let queryResult: { columns: string[]; rows: any[] };
+      try {
+        // 1차: apiClient (axios 기반, 인증/세션 안정적)
+        const response = await apiClient.post("/dashboards/execute-query", { query: sql });
+        if (response.data?.success && response.data?.data) {
+          queryResult = response.data.data;
+        } else {
+          throw new Error(response.data?.message || "쿼리 실행 실패");
+        }
+      } catch {
+        // 2차: dashboardApi (fetch 기반, 폴백)
+        queryResult = await dashboardApi.executeQuery(sql);
+      }
+
+      if (queryResult.rows.length === 0) {
         return { value: 0, rows: [] };
       }
 
+      // PostgreSQL bigint/numeric는 JS에서 문자열로 반환됨
+      // Recharts PieChart 등은 숫자 타입이 필수이므로 변환 처리
+      const processedRows = queryResult.rows.map((row: Record<string, unknown>) => {
+        const converted: Record<string, unknown> = { ...row };
+        for (const key of Object.keys(converted)) {
+          const val = converted[key];
+          if (typeof val === "string" && val !== "" && !isNaN(Number(val))) {
+            converted[key] = Number(val);
+          }
+        }
+        return converted;
+      });
+
       // 첫 번째 행의 value 컬럼 추출
-      const firstRow = result.rows[0];
-      const numericValue = parseFloat(firstRow.value ?? firstRow[result.columns[0]] ?? 0);
+      const firstRow = processedRows[0];
+      const numericValue = parseFloat(String(firstRow.value ?? firstRow[queryResult.columns[0]] ?? 0));
 
       return {
         value: Number.isFinite(numericValue) ? numericValue : 0,
-        rows: result.rows,
+        rows: processedRows,
       };
     }