diff --git a/api/dbus/org.desktopspec.ApplicationManager1.xml b/api/dbus/org.desktopspec.ApplicationManager1.xml
index 5cbe67a..a2d757d 100644
--- a/api/dbus/org.desktopspec.ApplicationManager1.xml
+++ b/api/dbus/org.desktopspec.ApplicationManager1.xml
@@ -15,8 +15,8 @@
             <arg type="h" name="pidfd" direction="in" />
 
             <arg type="s" name="id" direction="out" />
-            <arg type="o" name="application" direction="out" />
-            <arg type="o" name="application_instance" direction="out" />
+            <arg type="a{oa{sv}}" name="application_instance_info" direction="out" />
+            <annotation name="org.qtproject.QtDBus.QtTypeName.Out1" value="ObjectMap"/>
 
             <annotation
                 name="org.freedesktop.DBus.Description"
diff --git a/apps/dde-application-manager/src/main.cpp b/apps/dde-application-manager/src/main.cpp
index d90d294..88787f3 100644
--- a/apps/dde-application-manager/src/main.cpp
+++ b/apps/dde-application-manager/src/main.cpp
@@ -17,8 +17,6 @@ Q_LOGGING_CATEGORY(DDEAMProf, "dde.am.prof", QtInfoMsg)
 namespace {
 void registerComplexDbusType()
 {
-    qDBusRegisterMetaType<QMap<QString, QDBusUnixFileDescriptor>>();
-    qDBusRegisterMetaType<QMap<uint, QMap<QString, QDBusUnixFileDescriptor>>>();
     qRegisterMetaType<ObjectInterfaceMap>();
     qDBusRegisterMetaType<ObjectInterfaceMap>();
     qRegisterMetaType<ObjectMap>();
@@ -46,7 +44,8 @@ int main(int argc, char *argv[])
     auto storageDir = getXDGDataHome() + QDir::separator() + "deepin" + QDir::separator() + "ApplicationManager";
     auto storage = ApplicationManager1Storage::createApplicationManager1Storage(storageDir);
 
-    ApplicationManager1Service AMService{std::make_unique<CGroupsIdentifier>(), AMBus, storage};
+    ApplicationManager1Service AMService{std::make_unique<CGroupsIdentifier>(), storage};
+    AMService.initService(AMBus);
 
 #ifdef PROFILING_MODE
     auto end = std::chrono::high_resolution_clock::now();
diff --git a/src/cgroupsidentifier.cpp b/src/cgroupsidentifier.cpp
index 61d710e..557348e 100644
--- a/src/cgroupsidentifier.cpp
+++ b/src/cgroupsidentifier.cpp
@@ -19,19 +19,25 @@ IdentifyRet CGroupsIdentifier::Identify(pid_t pid)
 
     auto UnitStr = parseCGroupsPath(AppCgroupFile);
 
+    if (UnitStr.isEmpty()) {
+        qWarning() << "process CGroups file failed.";
+        return {};
+    }
+
     auto [appId, launcher, InstanceId] = processUnitName(UnitStr);
     return {std::move(appId), std::move(InstanceId)};
 }
 
 QString CGroupsIdentifier::parseCGroupsPath(QFile &cgroupFile) noexcept
 {
-    QTextStream stream{&cgroupFile};
-
-    if (stream.atEnd()) {
-        qWarning() << "read from cgroup file failed:" << stream.status();
+    QString content = cgroupFile.readAll();
+    if (content.isEmpty()) {
         return {};
     }
+
+    QTextStream stream{&content};
     stream.setEncoding(QStringConverter::Utf8);
+
     QString CGP;
     while (!stream.atEnd()) {
         auto line = stream.readLine();
diff --git a/src/dbus/applicationmanager1service.cpp b/src/dbus/applicationmanager1service.cpp
index 7eb1f09..ede24c5 100644
--- a/src/dbus/applicationmanager1service.cpp
+++ b/src/dbus/applicationmanager1service.cpp
@@ -14,10 +14,13 @@
 ApplicationManager1Service::~ApplicationManager1Service() = default;
 
 ApplicationManager1Service::ApplicationManager1Service(std::unique_ptr<Identifier> ptr,
-                                                       QDBusConnection &connection,
                                                        std::weak_ptr<ApplicationManager1Storage> storage) noexcept
     : m_identifier(std::move(ptr))
     , m_storage(std::move(storage))
+{
+}
+
+void ApplicationManager1Service::initService(QDBusConnection &connection) noexcept
 {
     if (!connection.registerService(DDEApplicationManager1ServiceName)) {
         qFatal("%s", connection.lastError().message().toLocal8Bit().data());
@@ -314,8 +317,7 @@ void ApplicationManager1Service::removeAllApplication() noexcept
 }
 
 QString ApplicationManager1Service::Identify(const QDBusUnixFileDescriptor &pidfd,
-                                             QDBusObjectPath &application,
-                                             QDBusObjectPath &application_instance)
+                                             ObjectMap &application_instance_info) const noexcept
 {
     if (!pidfd.isValid()) {
         qWarning() << "pidfd isn't a valid unix file descriptor";
@@ -353,15 +355,32 @@ QString ApplicationManager1Service::Identify(const QDBusUnixFileDescriptor &pidf
 
     const auto ret = m_identifier->Identify(pid);
 
+    if (ret.ApplicationId.isEmpty()) {
+        qInfo() << "Identify failed.";
+        return {};
+    }
+
     auto app = std::find_if(m_applicationList.cbegin(), m_applicationList.cend(), [&ret](const auto &appPtr) {
         return appPtr->id() == ret.ApplicationId;
     });
+
     if (app == m_applicationList.cend()) {
         qWarning() << "can't find application:" << ret.ApplicationId;
         return {};
     }
-    application = m_applicationList.key(*app);
-    application_instance = (*app)->findInstance(ret.InstanceId);
+
+    auto instance = (*app)->findInstance(ret.InstanceId);
+
+    if (auto path = instance.path(); path.isEmpty()) {
+        qWarning() << "can't find instance:" << path;
+        return {};
+    }
+
+    auto instanceObj = (*app)->m_Instances.constFind(instance);
+    auto map = getChildInterfacesAndPropertiesFromObject(instanceObj->get());
+
+    application_instance_info.insert(instance, map);
+
     return ret.ApplicationId;
 }
 
diff --git a/src/dbus/applicationmanager1service.h b/src/dbus/applicationmanager1service.h
index 18cb369..4ef8823 100644
--- a/src/dbus/applicationmanager1service.h
+++ b/src/dbus/applicationmanager1service.h
@@ -24,7 +24,6 @@ class ApplicationManager1Service final : public QObject
     Q_OBJECT
 public:
     explicit ApplicationManager1Service(std::unique_ptr<Identifier> ptr,
-                                        QDBusConnection &connection,
                                         std::weak_ptr<ApplicationManager1Storage> storage) noexcept;
     ~ApplicationManager1Service() override;
     ApplicationManager1Service(const ApplicationManager1Service &) = delete;
@@ -35,6 +34,7 @@ public:
     Q_PROPERTY(QList<QDBusObjectPath> List READ list NOTIFY listChanged)
     [[nodiscard]] QList<QDBusObjectPath> list() const;
 
+    void initService(QDBusConnection &connection) noexcept;
     bool addApplication(DesktopFile desktopFileSource) noexcept;
     void removeOneApplication(const QDBusObjectPath &application) noexcept;
     void removeAllApplication() noexcept;
@@ -44,7 +44,7 @@ public:
     JobManager1Service &jobManager() noexcept { return *m_jobManager; }
 
 public Q_SLOTS:
-    QString Identify(const QDBusUnixFileDescriptor &pidfd, QDBusObjectPath &application, QDBusObjectPath &application_instance);
+    QString Identify(const QDBusUnixFileDescriptor &pidfd, ObjectMap &application_instance_info) const noexcept;
     void ReloadApplications();
     [[nodiscard]] ObjectMap GetManagedObjects() const;
 
diff --git a/tests/main.cpp b/tests/main.cpp
index bddfcc3..1da4fe8 100644
--- a/tests/main.cpp
+++ b/tests/main.cpp
@@ -4,12 +4,20 @@
 
 #include <QCoreApplication>
 #include <gtest/gtest.h>
+#include "global.h"
 #include <QTimer>
 #include <QDBusMetaType>
 
 namespace {
-void registerComplexDbusType()
+void registerComplexDbusType()  // FIXME: test shouldn't associate with DBus
 {
+    qRegisterMetaType<ObjectInterfaceMap>();
+    qDBusRegisterMetaType<ObjectInterfaceMap>();
+    qRegisterMetaType<ObjectMap>();
+    qDBusRegisterMetaType<ObjectMap>();
+    qDBusRegisterMetaType<QMap<QString, QString>>();
+    qRegisterMetaType<PropMap>();
+    qDBusRegisterMetaType<PropMap>();
     qDBusRegisterMetaType<QDBusObjectPath>();
 }
 }  // namespace
diff --git a/tests/ut_applicationmanager.cpp b/tests/ut_applicationmanager.cpp
index a68fbbb..1437cac 100644
--- a/tests/ut_applicationmanager.cpp
+++ b/tests/ut_applicationmanager.cpp
@@ -6,6 +6,7 @@
 #include "dbus/applicationservice.h"
 #include "cgroupsidentifier.h"
 #include "constant.h"
+#include "dbus/instanceadaptor.h"
 #include <gtest/gtest.h>
 #include <QDBusConnection>
 #include <QSharedPointer>
@@ -34,7 +35,7 @@ public:
         bus.initGlobalServerBus(DBusType::Session);
         bus.setDestBus();
         std::shared_ptr<ApplicationManager1Storage> tmp{nullptr};
-        m_am = new ApplicationManager1Service{std::make_unique<CGroupsIdentifier>(), bus.globalServerBus(), tmp};
+        m_am = new ApplicationManager1Service{std::make_unique<CGroupsIdentifier>(), tmp};
         auto ptr = std::make_unique<QFile>(QString{"/usr/share/applications/test-Application.desktop"});
         DesktopFile file{std::move(ptr), "test-Application", 0, 0};
         QSharedPointer<ApplicationService> app = QSharedPointer<ApplicationService>::create(std::move(file), nullptr, tmp);
@@ -42,13 +43,13 @@ public:
             InstancePath.path().split('/').last(), ApplicationPath.path(), QString{"/"}, QString{"DDE"});
         app->m_Instances.insert(InstancePath, instance);
         m_am->m_applicationList.insert(ApplicationPath, app);
+        new InstanceAdaptor{instance.data()};
     }
 
     static void TearDownTestCase() { m_am->deleteLater(); }
 
     static inline ApplicationManager1Service *m_am{nullptr};
-    const static inline QDBusObjectPath ApplicationPath{QString{DDEApplicationManager1ObjectPath} + "/" +
-                                                        QUuid::createUuid().toString(QUuid::Id128)};
+    const static inline QDBusObjectPath ApplicationPath{QString{DDEApplicationManager1ObjectPath} + "/test_2dApplication"};
     const static inline QDBusObjectPath InstancePath{ApplicationPath.path() + "/" + QUuid::createUuid().toString(QUuid::Id128)};
 };
 
@@ -96,12 +97,22 @@ TEST_F(TestApplicationManager, identifyService)
 
     auto pidfd = pidfd_open(fakePid, 0);
     ASSERT_TRUE(pidfd > 0) << std::strerror(errno);
-    QDBusObjectPath application;
-    QDBusObjectPath application_instance;
-    auto appId = m_am->Identify(QDBusUnixFileDescriptor{pidfd}, application, application_instance);
+    ObjectMap instanceInfo;
+    auto appId = m_am->Identify(QDBusUnixFileDescriptor{pidfd}, instanceInfo);
     EXPECT_EQ(appId.toStdString(), QString{"test-Application"}.toStdString());
-    EXPECT_EQ(application.path().toStdString(), ApplicationPath.path().toStdString());
-    EXPECT_EQ(application_instance.path().toStdString(), InstancePath.path().toStdString());
+
+    auto instance = instanceInfo.constFind(InstancePath);
+    if (instance == instanceInfo.cend()) {
+        GTEST_SKIP_("couldn't find instance and skip.");
+    }
+
+    ObjectInterfaceMap map{{QString{InstanceInterface},
+                            QVariantMap{{QString{"Application"}, ApplicationPath},
+                                        {QString{"SystemdUnitPath"}, QDBusObjectPath{"/"}},
+                                        {QString{"Launcher"}, QString{"DDE"}},
+                                        {QString{"Orphaned"}, false}}}};
+    EXPECT_EQ(instance.value(), map);
+
     close(pidfd);
 
     if (pidFile.exists()) {
@@ -136,10 +147,18 @@ TEST_F(TestApplicationManager, identifyService)
     pidfd = pidfd_open(fakePid, 0);
     ASSERT_TRUE(pidfd > 0) << std::strerror(errno);
 
-    appId = m_am->Identify(QDBusUnixFileDescriptor{pidfd}, application, application_instance);
+    instanceInfo.clear();
+
+    appId = m_am->Identify(QDBusUnixFileDescriptor{pidfd}, instanceInfo);
     EXPECT_EQ(appId.toStdString(), QString{"test-Application"}.toStdString());
-    EXPECT_EQ(application.path().toStdString(), ApplicationPath.path().toStdString());
-    EXPECT_EQ(application_instance.path().toStdString(), InstancePath.path().toStdString());
+
+    instance = instanceInfo.constFind(InstancePath);
+    if (instance == instanceInfo.cend()) {
+        GTEST_SKIP_("couldn't find instance and skip.");
+    }
+
+    EXPECT_EQ(instance.value(), map);
+
     close(pidfd);
 
     if (pidFile.exists()) {
diff --git a/tests/ut_job.cpp b/tests/ut_job.cpp
index 80522e4..d1bfaa9 100644
--- a/tests/ut_job.cpp
+++ b/tests/ut_job.cpp
@@ -22,16 +22,16 @@ public:
 
         m_thread = QThread::create(
             [](QPromise<QVariantList> promise) {
-                std::this_thread::sleep_for(2ms);
+                std::this_thread::sleep_for(4ms);
                 promise.start();
-                std::this_thread::sleep_for(1ms);
+                std::this_thread::sleep_for(2ms);
                 if (promise.isCanceled()) {
                     return;
                 }
 
-                std::this_thread::sleep_for(1ms);
+                std::this_thread::sleep_for(2ms);
                 promise.suspendIfRequested();
-                std::this_thread::sleep_for(1ms);
+                std::this_thread::sleep_for(2ms);
 
                 std::size_t x{0};
                 for (std::size_t i = 0; i < 20000; ++i) {
@@ -62,14 +62,14 @@ TEST_F(TestJob, cancelJob)
 {
     m_thread->start();
 
-    std::this_thread::sleep_for(1ms);
-    EXPECT_EQ(m_jobService->status().toStdString(), std::string{"pending"});
     std::this_thread::sleep_for(2ms);
+    EXPECT_EQ(m_jobService->status().toStdString(), std::string{"pending"});
+    std::this_thread::sleep_for(4ms);
     EXPECT_EQ(m_jobService->status().toStdString(), std::string{"running"});
 
     m_jobService->Cancel();
 
-    std::this_thread::sleep_for(1ms);
+    std::this_thread::sleep_for(2ms);
 
     EXPECT_EQ(m_jobService->status().toStdString(), std::string{"canceled"});
 }
@@ -78,20 +78,20 @@ TEST_F(TestJob, suspendAndResumeJob)
 {
     m_thread->start();
 
-    std::this_thread::sleep_for(3ms);
+    std::this_thread::sleep_for(6ms);
 
     EXPECT_EQ(m_jobService->status().toStdString(), std::string{"running"});
 
     m_jobService->Suspend();
 
-    std::this_thread::sleep_for(1ms);
+    std::this_thread::sleep_for(2ms);
 
     EXPECT_EQ(m_jobService->status().toStdString(), std::string{"suspending"});
-    std::this_thread::sleep_for(1ms);
+    std::this_thread::sleep_for(2ms);
     EXPECT_EQ(m_jobService->status().toStdString(), std::string{"suspended"});
     m_jobService->Resume();
 
-    std::this_thread::sleep_for(1ms);
+    std::this_thread::sleep_for(2ms);
     EXPECT_EQ(m_jobService->status().toStdString(), std::string{"running"});
 
     EXPECT_TRUE(m_thread->wait());