diff --git a/src/backend/handler.js b/src/backend/handler.js
index 2cb34ad..c13af5b 100644
--- a/src/backend/handler.js
+++ b/src/backend/handler.js
@@ -127,9 +127,15 @@ module.exports.itemDetail = async (event) => {
   }
 };
 
-module.exports.qrcodeTest = async (event) => {
-  const re = await authenticator.generateQrcode("userId=awefoiewbuafwehweabu&itemId=eifbaif7382bvhdj&token=euhsnvjqifjekvne");
-  return builder.buildAWSResponse(re);
+module.exports.itemSellerContract = async (event) => {
+  if (await checkAuth(event) == true) {
+    const response = await itemHandler.sellerContract(event);
+    console.log(response);
+    return response;
+  } else {
+    console.log("Auth fail");
+    return getAuthFailResponse();
+  }
 };
 
 module.exports.test = async (event) => {
diff --git a/src/backend/handlers/item.js b/src/backend/handlers/item.js
index 3d51935..7333fb2 100644
--- a/src/backend/handlers/item.js
+++ b/src/backend/handlers/item.js
@@ -2,6 +2,7 @@
 
 const parser = require("../utils/parser");
 const database = require("../utils/database");
+const authenticator = require("../utils/authenticator");
 const responseTemplate = require("../responses/template");
 
 const registration = async (event) => {
@@ -23,6 +24,7 @@ const registration = async (event) => {
 
 const list = async (event) => {
   const userId = parser.getUserId(event);
+  const mode = parser.getExtras(event)["mode"];
 
   const result = await database.getUserItem(userId);
   if (result == null) {
@@ -30,7 +32,7 @@ const list = async (event) => {
   } else if (result.length == 0) {
     return responseTemplate.itemListFail("등록된 상품이 없습니다.");
   } else {
-    return responseTemplate.itemListSuccess(result, "list");
+    return responseTemplate.itemListSuccess(result, mode);
   }
 };
 
@@ -71,7 +73,7 @@ const detail = async (event) => {
   const item = await database.getItem(itemId);
   if (item != null) {
     const user = (mode == "search" ? await database.getUser(userId) : null);
-    if (user != null) {
+    if (user != null || mode == "list") {
       return responseTemplate.itemDetail(item, mode, user);
     } else {
       return responseTemplate.itemListFail("상품 조회에 실패했습니다.");
@@ -81,10 +83,32 @@ const detail = async (event) => {
   }
 };
 
+const sellerContract = async (event) => {
+  const userId = parser.getUserId(event);
+  const extras = parser.getExtras(event);
+  const itemId = extras["itemId"];
+
+  const qrcode = authenticator.getContractQrcode(userId, itemId);
+  const token = qrcode.token;
+  const qrcodePaths = await database.uploadImages("contract/" + token + "/", [qrcode.qrcodePath]);
+
+  if (qrcodePaths == null) {
+    return responseTemplate.processFail("상품 판매 실패", "상품 판매 등록에 실패했습니다.");
+  } else {
+    const result = await database.registTempDeal(userId, itemId, token);
+    if (result.success == true) {
+      return responseTemplate.itemSellerContractSuccess(qrcodePaths[0], itemId);
+    } else {
+      return responseTemplate.processFail("상품 판매 실패", "상품 판매 등록에 실패했습니다.");
+    }
+  }
+};
+
 module.exports = {
   registration,
   list,
   searchCategory,
   searchKeyword,
-  detail
+  detail,
+  sellerContract
 };
diff --git a/src/backend/responses/common.js b/src/backend/responses/common.js
index 3c1d592..6c08e88 100644
--- a/src/backend/responses/common.js
+++ b/src/backend/responses/common.js
@@ -14,8 +14,8 @@ module.exports.welcome = () => {
   // Construct seller card
   const sellerThumbnail = builder.getThumbnail(resource.sellerThumbnailUrl);
   const sellerItemRegistButton = builder.getButton("상품 등록", "block", "상품 등록", resource.sellerItemRegistBlockId);
-  const sellerItemListButton = builder.getButton("상품 목록", "block", "상품 목록", resource.sellerItemListBlockId);
-  const sellerContractButton = builder.getButton("판매자 거래 체결", "block", "판매자 거래 체결", resource.sellerContractBlockId);
+  const sellerItemListButton = builder.getButton("상품 목록", "block", "상품 목록", resource.sellerItemListBlockId, {mode: "list"});
+  const sellerContractButton = builder.getButton("판매자 거래 체결", "block", "판매자 거래 체결", resource.sellerItemListBlockId, {mode: "contract"});
   const sellerCardBody = builder.getBasicCardBody("판매", "상품을 판매합니다.", sellerThumbnail, [sellerItemRegistButton, sellerItemListButton, sellerContractButton]);
 
   // Construct user information card
@@ -28,3 +28,14 @@ module.exports.welcome = () => {
   // Build response
   return builder.buildResponse([builder.getCarousel("basicCard", [buyerCardBody, sellerCardBody, userInfoCardBody])], false);
 };
+
+module.exports.processFail = (errorTitle, errorMessage) => {
+  // Construct result card
+  const resultThumbnail = builder.getThumbnail(resource.itemRegistrationFailThumbnailUrl);
+  const resultTitle = errorTitle;
+  const resultDescription = errorMessage;
+  const resultCard = builder.getBasicCard(resultTitle, resultDescription, resultThumbnail);
+
+  // Build response
+  return builder.buildResponse([resultCard]);
+};
diff --git a/src/backend/responses/item.js b/src/backend/responses/item.js
index 4dac456..2aa6763 100644
--- a/src/backend/responses/item.js
+++ b/src/backend/responses/item.js
@@ -9,8 +9,7 @@ module.exports.itemRegistrationSuccess = (itemName, itemDetail, itemPrice, image
   const resultTitle = itemName;
   const resultDescription = itemDetail;
   const resultPrice = itemPrice;
-  const resultMainMenuButton = builder.getButton("처음으로", "block", "처음으로", resource.welcomeBlockId);
-  const resultCard = builder.getCommerceCard(resultTitle, resultDescription, resultPrice, resultThumbnail, null, [resultMainMenuButton]);
+  const resultCard = builder.getCommerceCard(resultTitle, resultDescription, resultPrice, resultThumbnail, null);
 
   // Build response
   return builder.buildResponse([resultCard]);
@@ -21,15 +20,14 @@ module.exports.itemRegistrationFail = (errorMessage) => {
   const resultThumbnail = builder.getThumbnail(resource.itemRegistrationFailThumbnailUrl);
   const resultTitle = "상품 등록 실패";
   const resultDescription = errorMessage;
-  const resultMainMenuButton = builder.getButton("처음으로", "block", "처음으로", resource.welcomeBlockId);
-  const resultCard = builder.getBasicCard(resultTitle, resultDescription, resultThumbnail, [resultMainMenuButton]);
+  const resultCard = builder.getBasicCard(resultTitle, resultDescription, resultThumbnail);
 
   // Build response
   return builder.buildResponse([resultCard]);
 };
 
 module.exports.itemListSuccess = (itemList, mode="search") => {
-  const modes = ["list", "search"];
+  const modes = ["list", "search", "contract"];
 
   if (modes.includes(mode)) {
     // Construct commerce cards
@@ -53,9 +51,8 @@ module.exports.itemListSuccess = (itemList, mode="search") => {
       } else if (mode == "search") {
         buttons.push(builder.getButton("구매", "block", "구매", resource.itemBuyBlockId, {userId: resultUserId, itemId: resultItemId}));
         buttons.push(builder.getButton("상세정보", "block", "상세정보", resource.itemDetailBlockId, {userId: resultUserId, itemId: resultItemId, mode: "search"}));
-        // buttons.push(builder.getButton("신고", "block", "신고", resource.itemReportBlockId, {userId: resultUserId, itemId: resultItemId}));
-      } else if (mode == "transaction") {
-        buttons.push(builder.getButton("판매", "block", "판매", resource.itemSellBlockId, {itemId: resultItemId}));
+      } else if (mode == "contract") {
+        buttons.push(builder.getButton("판매", "block", "판매", resource.itemSellerContractBlockId, {itemId: resultItemId}));
       }
       bodys.push(builder.getCommerceCardBody(resultTitle, resultDescription, resultPrice, resultThumbnail, resultNickname, buttons));
     }
@@ -72,8 +69,7 @@ module.exports.itemListFail = (errorMessage) => {
   const resultThumbnail = builder.getThumbnail(resource.itemRegistrationFailThumbnailUrl);
   const resultTitle = "상품 조회 실패";
   const resultDescription = errorMessage;
-  const resultMainMenuButton = builder.getButton("처음으로", "block", "처음으로", resource.welcomeBlockId);
-  const resultCard = builder.getBasicCard(resultTitle, resultDescription, resultThumbnail, [resultMainMenuButton]);
+  const resultCard = builder.getBasicCard(resultTitle, resultDescription, resultThumbnail);
 
   // Build response
   return builder.buildResponse([resultCard]);
@@ -81,15 +77,23 @@ module.exports.itemListFail = (errorMessage) => {
 
 module.exports.itemDetail = (item, mode="list", user=null) => {
   // Construct registration guide
-  const resultThumbnail = builder.getThumbnail(item.item_image[0]);
-  const resultUserId = (user.userId != undefined ? user.userId : null);
+  const resultThumbnail = builder.getThumbnail(item.item_image[0], true, 500, 500);
+  const resultUserId = (user != null ? user.userId : null);
   const resultItemId = item.itemId;
   const resultTitle = item.item_name + "(" + item.item_price + "원)";
-  const resultDescription = item.item_detail + "\n";// + item.item_date;
+  const resultDescription = item.item_detail + "\n"+ item.item_date;
   const resultMainMenuButton = (mode == "list" ? builder.getButton("삭제", "block", "삭제", resource.itemDeleteBlockId) : builder.getButton("구매", "block", "구매", resource.itemBuyBlockId, {userId: resultUserId, itemId: resultItemId}));
   const resultCard1 = builder.getBasicCardBody(resultTitle, resultDescription, "", [resultMainMenuButton, resultMainMenuButton]);
-  const resultCard2 = builder.getBasicCardBody("", "uiiyfiyiyfi", resultThumbnail);
+  const resultCard2 = builder.getBasicCardBody("", "", resultThumbnail);
 
   // Build response
   return builder.buildResponse([builder.getCarousel("basicCard", [resultCard1, resultCard2, resultCard2])]);
 };
+
+module.exports.itemSellerContractSuccess = (qrcodePath, itemId) => {
+  const resultThumbnail = builder.getThumbnail(qrcodePath, true, 200, 200);
+  const resultText = "구매자에게 '구매자 거래 체결' 메뉴를 이용해 QR코드를 스캔하도록 안내해 주세요.";
+  const resultOkButton = builder.getButton("스캔완료", "block", "스캔완료", resource.itemSellerContractVerifyBlockId, {itemId: itemId});
+  const basicCard = builder.getBasicCard("", resultText, resultThumbnail, [resultOkButton]);
+  return builder.buildResponse([basicCard]);
+};
diff --git a/src/backend/responses/template.js b/src/backend/responses/template.js
index 15077c8..0b0c98d 100644
--- a/src/backend/responses/template.js
+++ b/src/backend/responses/template.js
@@ -6,6 +6,7 @@ const itemResponse = require("./item");
 
 module.exports = {
   welcome: commonResponse.welcome,
+  processFail: commonResponse.processFail,
   userRegistration: userResponse.userRegistration,
   userRegistrationSuccess: userResponse.userRegistrationSuccess,
   userRegistrationFail: userResponse.userRegistrationFail,
@@ -16,5 +17,6 @@ module.exports = {
   itemRegistrationFail: itemResponse.itemRegistrationFail,
   itemListSuccess: itemResponse.itemListSuccess,
   itemListFail: itemResponse.itemListFail,
-  itemDetail: itemResponse.itemDetail
+  itemDetail: itemResponse.itemDetail,
+  itemSellerContractSuccess: itemResponse.itemSellerContractSuccess
 };
diff --git a/src/backend/responses/user.js b/src/backend/responses/user.js
index 4cde1d4..940e3a0 100644
--- a/src/backend/responses/user.js
+++ b/src/backend/responses/user.js
@@ -48,11 +48,10 @@ module.exports.userInformation = (nickname, school_name, school_mail, openprofil
   const infoSchoolMailList = builder.getListItem(school_mail, "학교 이메일");
   const infoOpenProfileList = builder.getListItem(openprofile, "오픈프로필 주소");
   const infoReliabilityScoreList = builder.getListItem(reliability_score, "신뢰도");
-  const infoOpenProfileButton = builder.getButton("오픈프로필로", "webLink", openprofile);
-  const infoMainMenuButton = builder.getButton("처음으로", "block", "처음으로", resource.welcomeBlockId);
-  const infoCard = builder.getListCard(infoTitle, "", [infoNicknameList, infoSchoolNameList, infoSchoolMailList,
-                                                       infoOpenProfileList, infoReliabilityScoreList],
-                                                      [infoOpenProfileButton, infoMainMenuButton]);
+  const infoOpenProfileButton = builder.getButton("오픈프로필로 가기", "webLink", openprofile);
+  const infoWithdrawButton = builder.getButton("회원 탈퇴", "block", "회원 탈퇴", resource.userWithdrawBlockId);
+  const infoCard = builder.getListCard(infoTitle, "", [infoNicknameList, infoSchoolNameList, infoSchoolMailList, infoOpenProfileList, infoReliabilityScoreList],
+                                                      [infoOpenProfileButton, infoWithdrawButton]);
 
   // Build response
   return builder.buildResponse([infoCard]);
diff --git a/src/backend/serverless.yml b/src/backend/serverless.yml
index f3f71c6..0e1bd35 100644
--- a/src/backend/serverless.yml
+++ b/src/backend/serverless.yml
@@ -67,11 +67,11 @@ functions:
       - http:
           path: item/detail
           method: post
-  qrcodeTest:
-    handler: handler.qrcodeTest
+  itemSellerContract:
+    handler: handler.itemSellerContract
     events:
       - http:
-          path: qrcode
+          path: item/contract/seller
           method: post
   test:
     handler: handler.test
diff --git a/src/backend/utils/authenticator.js b/src/backend/utils/authenticator.js
index afb17e5..4835f69 100755
--- a/src/backend/utils/authenticator.js
+++ b/src/backend/utils/authenticator.js
@@ -14,9 +14,9 @@ const transporter = nodemailer.createTransport({
   }
 });
 
-const generateQrcode = (url) => {
+const generateQrcode = (string) => {
   const path = "/tmp/qrcode.png";
-  qrcode.toFile(path, url);
+  qrcode.toFile(path, string);
   return path;
 };
 
@@ -34,6 +34,16 @@ const generateToken = (seed="") => {
   return token;
 };
 
+const getContractQrcode = (userId, itemId) => {
+  const token = generateToken();
+  const info = "userId=" + userId + "&itemId=" + itemId + "&token=" + token;
+  const qrcodePath = generateQrcode(info);
+  return {
+    token: token,
+    qrcodePath: qrcodePath
+  };
+};
+
 const generateMailAuthenticationUrl = (userId, token) => {
   return resource.mailAuthenticateEndpoint + "?userId=" + userId + "&token=" + token;
 }
@@ -83,8 +93,8 @@ const sendAuthenticateMail = async (userId, userMail) => {
 };
 
 module.exports = {
-  generateQrcode,
   authenticateUser,
   authenticateMail,
-  sendAuthenticateMail
+  sendAuthenticateMail,
+  getContractQrcode
 }
diff --git a/src/backend/utils/builder.js b/src/backend/utils/builder.js
index 0236d69..b87cb20 100644
--- a/src/backend/utils/builder.js
+++ b/src/backend/utils/builder.js
@@ -64,9 +64,12 @@ const getButton = (label, action, data, blockId=undefined, extra=undefined) => {
   }
 }
 
-const getThumbnail = (imageUrl) => {
+const getThumbnail = (imageUrl, fixedRatio=false, width=100, height=100) => {
   return {
-    imageUrl: imageUrl
+    imageUrl: imageUrl,
+    fixedRatio: fixedRatio,
+    width: width,
+    height: height
   };
 }
 
diff --git a/src/backend/utils/resource.js b/src/backend/utils/resource.js
index 18dac01..d08b760 100644
--- a/src/backend/utils/resource.js
+++ b/src/backend/utils/resource.js
@@ -31,5 +31,7 @@ module.exports = {
     itemDeleteBlockId: "5decfa26ffa74800014b098e", // Temp
     itemBuyBlockId: "5decfa26ffa74800014b098e", // Temp
     itemReportBlockId: "5decfa26ffa74800014b098e", // Temp
-    itemSellBlockId: "5decfa26ffa74800014b098e", // Temp
+    itemSellerContractBlockId: "5de3d4eaffa7480001988104",
+    userWithdrawBlockId: "5de3d56d8192ac0001d65d18", // Temp
+    itemSellerContractVerifyBlockId: "5de3d56d8192ac0001d65d18", // Temp
 };