diff --git a/backend/src/main/java/com/goldenchart/service/DesktopAppBuildService.java b/backend/src/main/java/com/goldenchart/service/DesktopAppBuildService.java
index 6debe9f..432b4a3 100644
--- a/backend/src/main/java/com/goldenchart/service/DesktopAppBuildService.java
+++ b/backend/src/main/java/com/goldenchart/service/DesktopAppBuildService.java
@@ -78,25 +78,35 @@ public class DesktopAppBuildService {
         if (!jenkinsEnabled) {
             throw new ResponseStatusException(HttpStatus.SERVICE_UNAVAILABLE, "Jenkins 연동이 비활성화되어 있습니다.");
         }
+        try {
+            syncGitLatest();
 
-        syncGitLatest();
+            DesktopAppBuildStatusDto current = fetchLastBuildStatus();
+            if (current.isBuilding()) {
+                return DesktopAppBuildTriggerDto.builder()
+                        .accepted(false)
+                        .buildNumber(current.getBuildNumber())
+                        .message("이미 빌드가 진행 중입니다 (#" + current.getBuildNumber() + ").")
+                        .build();
+            }
 
-        DesktopAppBuildStatusDto current = fetchLastBuildStatus();
-        if (current.isBuilding()) {
+            triggerJenkinsBuild();
+            DesktopAppBuildStatusDto after = fetchLastBuildStatus();
             return DesktopAppBuildTriggerDto.builder()
-                    .accepted(false)
-                    .buildNumber(current.getBuildNumber())
-                    .message("이미 빌드가 진행 중입니다 (#" + current.getBuildNumber() + ").")
+                    .accepted(true)
+                    .buildNumber(after.getBuildNumber())
+                    .message("Jenkins에서 macOS·Windows 데스크톱 앱 빌드를 시작했습니다. 완료 후 설치 파일이 자동으로 반영됩니다.")
                     .build();
+        } catch (ResponseStatusException e) {
+            throw e;
+        } catch (WebClientResponseException e) {
+            log.warn("[desktop-build] Jenkins HTTP {}: {}", e.getStatusCode(), e.getResponseBodyAsString());
+            throw new ResponseStatusException(HttpStatus.BAD_GATEWAY, jenkinsHttpError(e));
+        } catch (Exception e) {
+            log.warn("[desktop-build] trigger failed: {}", e.getMessage());
+            throw new ResponseStatusException(HttpStatus.BAD_GATEWAY,
+                    "Jenkins 빌드 요청 실패: " + rootMessage(e));
         }
-
-        triggerJenkinsBuild();
-        DesktopAppBuildStatusDto after = fetchLastBuildStatus();
-        return DesktopAppBuildTriggerDto.builder()
-                .accepted(true)
-                .buildNumber(after.getBuildNumber())
-                .message("Jenkins에서 macOS·Windows 데스크톱 앱 빌드를 시작했습니다. 완료 후 설치 파일이 자동으로 반영됩니다.")
-                .build();
     }
 
     private DesktopAppBuildStatusDto fetchLastBuildStatus() {
@@ -156,16 +166,28 @@ public class DesktopAppBuildService {
     private void triggerJenkinsBuild() {
         WebClient client = jenkinsClient();
         String buildUrl = jobApiPath() + "/build";
+        Map<String, String> crumb = fetchCrumbOptional(client);
         try {
-            postBuild(client, buildUrl, null);
-        } catch (WebClientResponseException.Forbidden e) {
-            Map<String, String> crumb = fetchCrumb(client);
             postBuild(client, buildUrl, crumb);
+        } catch (WebClientResponseException.Forbidden e) {
+            if (crumb != null) throw e;
+            postBuild(client, buildUrl, fetchCrumb(client));
+        }
+    }
+
+    private Map<String, String> fetchCrumbOptional(WebClient client) {
+        try {
+            return fetchCrumb(client);
+        } catch (Exception e) {
+            log.debug("[desktop-build] crumb optional skip: {}", e.getMessage());
+            return null;
         }
     }
 
     private void postBuild(WebClient client, String buildUrl, Map<String, String> crumb) {
-        var spec = client.post().uri(buildUrl);
+        var spec = client.post()
+                .uri(buildUrl)
+                .contentType(MediaType.APPLICATION_FORM_URLENCODED);
         if (crumb != null) {
             spec = spec.header(crumb.get("field"), crumb.get("value"));
         }
@@ -215,6 +237,27 @@ public class DesktopAppBuildService {
         return t == null || t.isBlank() ? null : t;
     }
 
+    private static String jenkinsHttpError(WebClientResponseException e) {
+        int code = e.getStatusCode().value();
+        if (code == 401 || code == 403) {
+            return "Jenkins 인증 실패 — GC_DESKTOP_JENKINS_USER·TOKEN을 확인하세요.";
+        }
+        if (code == 404) {
+            return "Jenkins Job을 찾을 수 없습니다 — goldenChart-Desktop-Pipeline Job을 등록하세요.";
+        }
+        return "Jenkins HTTP " + code + ": " + e.getStatusText();
+    }
+
+    private static String rootMessage(Throwable e) {
+        Throwable t = e;
+        while (t.getCause() != null) t = t.getCause();
+        String msg = t.getMessage();
+        if (msg != null && msg.contains("Connection refused")) {
+            return "Jenkins에 연결할 수 없습니다. Docker 환경이면 GC_DESKTOP_JENKINS_URL=http://host.docker.internal:8090 를 설정하세요.";
+        }
+        return msg != null ? msg : e.toString();
+    }
+
     private void syncGitLatest() {
         if (!StringUtils.hasText(gitBareDir)) {
             log.debug("[desktop-build] git-bare-dir 미설정 — Jenkins SCM checkout에 위임");
diff --git a/backend/src/main/resources/application-docker.yml b/backend/src/main/resources/application-docker.yml
index acd17f5..b2e4b9a 100644
--- a/backend/src/main/resources/application-docker.yml
+++ b/backend/src/main/resources/application-docker.yml
@@ -22,6 +22,16 @@ goldenchart:
   cors:
     allowed-origins:
       - "*"
+  desktop-app:
+    release-dir: ${GC_DESKTOP_APP_RELEASE_DIR:/app/data/desktop-releases}
+    public-base-url: ${GC_DESKTOP_APP_PUBLIC_BASE_URL:http://exdev.co.kr}
+    jenkins:
+      enabled: ${GC_DESKTOP_JENKINS_ENABLED:true}
+      # Docker 컨테이너 → 호스트 Jenkins (127.0.0.1:8090 은 컨테이너 자신을 가리킴)
+      url: ${GC_DESKTOP_JENKINS_URL:http://host.docker.internal:8090}
+      job: ${GC_DESKTOP_JENKINS_JOB:goldenChart-Desktop-Pipeline}
+      user: ${GC_DESKTOP_JENKINS_USER:}
+      token: ${GC_DESKTOP_JENKINS_TOKEN:}
 
 # FCM — exdev: FIREBASE_ENABLED=true + 서비스 계정 JSON 마운트
 firebase:
diff --git a/docker-compose.yml b/docker-compose.yml
index c288557..2fe703b 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -69,6 +69,13 @@ services:
       GC_MOBILE_APP_RELEASE_DIR: /app/data/mobile-releases
       GC_MOBILE_APP_VERSION: ${GC_MOBILE_APP_VERSION:-}
       GC_MOBILE_APP_PUBLIC_BASE_URL: ${GC_MOBILE_APP_PUBLIC_BASE_URL:-http://exdev.co.kr}
+      GC_DESKTOP_APP_RELEASE_DIR: /app/data/desktop-releases
+      GC_DESKTOP_APP_PUBLIC_BASE_URL: ${GC_DESKTOP_APP_PUBLIC_BASE_URL:-http://exdev.co.kr}
+      GC_DESKTOP_JENKINS_ENABLED: ${GC_DESKTOP_JENKINS_ENABLED:-true}
+      GC_DESKTOP_JENKINS_URL: ${GC_DESKTOP_JENKINS_URL:-http://host.docker.internal:8090}
+      GC_DESKTOP_JENKINS_JOB: ${GC_DESKTOP_JENKINS_JOB:-goldenChart-Desktop-Pipeline}
+      GC_DESKTOP_JENKINS_USER: ${GC_DESKTOP_JENKINS_USER:-}
+      GC_DESKTOP_JENKINS_TOKEN: ${GC_DESKTOP_JENKINS_TOKEN:-}
       FIREBASE_ENABLED: ${FIREBASE_ENABLED:-false}
       FIREBASE_SERVICE_ACCOUNT: ${FIREBASE_SERVICE_ACCOUNT:-firebase-service-account.json}
     ports:
@@ -76,6 +83,8 @@ services:
     volumes:
       - verification-images:/app/data/verification-images
       - ./data/mobile-releases:/app/data/mobile-releases:ro
+      - ./data/desktop-releases:/app/data/desktop-releases:ro
+      - ./frontend/public/desktop/updates:/app/data/desktop-updates:ro
       # FCM: .env 에 FIREBASE_SERVICE_ACCOUNT_PATH=/path/to/firebase-service-account.json 설정 시 주석 해제
       # - ${FIREBASE_SERVICE_ACCOUNT_PATH}:/app/firebase-service-account.json:ro
     healthcheck:
@@ -86,6 +95,8 @@ services:
       start_period: 60s
     networks:
       - goldenchart-net
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
 
   # ── React Frontend (Nginx) ───────────────────────────────────────────────
   frontend: