diff --git a/controllers/challengeController.js b/controllers/challengeController.js
index 88913c4..b05310b 100644
--- a/controllers/challengeController.js
+++ b/controllers/challengeController.js
@@ -87,12 +87,17 @@ const challengeController = {
       challengeId,
     });
 
+    const myResult = result.data.filter((obj) => obj.id === myId)[0];
+    const otherResult = result.data.filter((obj) => obj.id !== myId)[0];
+
     if (result.success) {
       return res.status(200).json({
         success: true,
         message: '챌린지 조회 요청에 성공했습니다.',
-        data: result.data,
-        myId,
+        data: {
+          myResult,
+          otherResult,
+        },
       });
     } else {
       return res.status(400).json({
diff --git a/models/memberModel.js b/models/memberModel.js
index 44257c6..9d3b36b 100644
--- a/models/memberModel.js
+++ b/models/memberModel.js
@@ -5,13 +5,33 @@ const memberModel = {
     const connection = await pool.getConnection();
 
     try {
-      const [rows, fields] = await connection.query(
-        'SELECT m.id, m.nickname, m.champion, cc.is_authenticate, cc.participation_count, ch.name AS challenge_name, ch.category, ch.reward FROM member m JOIN (SELECT cp.member_id, MAX(cc.created_at) AS max_created_at FROM challenge_participant cp JOIN challenge_certification cc ON cp.member_id = cc.member_id AND cp.challenge_id = cc.challenge_id WHERE cp.challenge_id IN (SELECT cp_inner.challenge_id FROM challenge_participant cp_inner WHERE cp_inner.member_id IN (SELECT cp_sub.member_id FROM challenge_participant cp_sub WHERE cp_sub.challenge_id = ?)) GROUP BY cp.member_id) AS latest_certification ON m.id = latest_certification.member_id JOIN challenge_certification cc ON latest_certification.member_id = cc.member_id AND latest_certification.max_created_at = cc.created_at JOIN challenge ch ON cc.challenge_id = ch.id;',
+      const [rows] = await connection.query(
+        `
+        SELECT
+          ch.name AS challengeName,
+          ch.category,
+          ch.reward,
+          m.id,
+          m.nickname,
+          m.champion,
+          COUNT(cc.member_id) AS certificationCount
+        FROM
+          challenge ch
+        JOIN
+          challenge_participant cp ON ch.id = cp.challenge_id
+        JOIN
+          member m ON cp.member_id = m.id
+        LEFT JOIN
+          challenge_certification cc ON cp.member_id = cc.member_id AND ch.id = cc.challenge_id AND cc.is_authenticate = true
+        WHERE
+          ch.id = ?
+        GROUP BY
+          m.id;
+        `,
         [challengeId]
       );
+
       return rows;
-    } catch (err) {
-      return err;
     } finally {
       connection.release();
     }