diff --git a/CMakeLists.txt b/CMakeLists.txt
index 226d140..700fdf9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,12 +36,14 @@ set(SOURCE_FILES
     main.cpp
     mainwindow.cpp
     zjuconnectmode.cpp
+    application/applicationlogger.cpp
     application/connectionsession.cpp
     application/systemproxysession.cpp
     core/corecommandbuilder.cpp
     core/coreoutputbuffer.cpp
     core/coreoutputparser.cpp
     core/connectionsessionstate.cpp
+    infrastructure/corelogfile.cpp
     infrastructure/settingsprofileloader.cpp
     infrastructure/platformsystemproxybackend.cpp
     zjuconnectcontroller/zjuconnectcontroller.cpp
@@ -120,6 +122,22 @@ target_link_libraries(${PROJECT_NAME}
 include(CTest)
 
 if(BUILD_TESTING)
+    add_executable(applicationlogger_test
+        tests/applicationlogger_test.cpp
+        application/applicationlogger.cpp
+    )
+    target_include_directories(applicationlogger_test PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+    target_link_libraries(applicationlogger_test Qt::Core)
+    add_test(NAME applicationlogger_test COMMAND applicationlogger_test)
+
+    add_executable(corelogfile_test
+        tests/corelogfile_test.cpp
+        infrastructure/corelogfile.cpp
+    )
+    target_include_directories(corelogfile_test PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+    target_link_libraries(corelogfile_test Qt::Core)
+    add_test(NAME corelogfile_test COMMAND corelogfile_test)
+
     add_executable(corecommandbuilder_test
         tests/corecommandbuilder_test.cpp
         core/corecommandbuilder.cpp
diff --git a/application/applicationlogger.cpp b/application/applicationlogger.cpp
new file mode 100644
index 0000000..123b68d
--- /dev/null
+++ b/application/applicationlogger.cpp
@@ -0,0 +1,143 @@
+#include "applicationlogger.h"
+
+#include <QCoreApplication>
+#include <QDateTime>
+#include <QIODevice>
+#include <QMetaObject>
+#include <QRecursiveMutex>
+#include <QThread>
+
+#include <cstdio>
+
+namespace
+{
+ApplicationLogger *messageHandlerTarget = nullptr;
+QRecursiveMutex messageHandlerMutex;
+
+QString currentTimestamp()
+{
+    return QDateTime::currentDateTime().toString("yyyy/MM/dd hh:mm:ss");
+}
+
+QString messageTypeName(QtMsgType type)
+{
+    switch (type)
+    {
+    case QtDebugMsg:
+        return "DEBUG";
+    case QtInfoMsg:
+        return "INFO";
+    case QtWarningMsg:
+        return "WARNING";
+    case QtCriticalMsg:
+        return "CRITICAL";
+    case QtFatalMsg:
+        return "FATAL";
+    }
+
+    return "UNKNOWN";
+}
+}
+
+ApplicationLogger::ApplicationLogger(QObject *parent)
+    : QObject(parent),
+      standardOutput(stdout, QIODevice::WriteOnly)
+{
+    writeStandardOutput(
+        "=== Log started at " + currentTimestamp()
+        + " with " + QCoreApplication::applicationName()
+        + " " + QCoreApplication::applicationVersion()
+        + " ==="
+    );
+
+    {
+        QMutexLocker locker(&messageHandlerMutex);
+        messageHandlerTarget = this;
+        previousMessageHandler = qInstallMessageHandler(ApplicationLogger::qtMessageHandler);
+    }
+}
+
+ApplicationLogger::~ApplicationLogger()
+{
+    {
+        QMutexLocker locker(&messageHandlerMutex);
+        if (messageHandlerTarget == this)
+        {
+            messageHandlerTarget = nullptr;
+            qInstallMessageHandler(previousMessageHandler);
+        }
+    }
+
+    writeStandardOutput("=== Log ended at " + currentTimestamp() + " ===");
+}
+
+void ApplicationLogger::appendMessage(const QString &prefix, const QString &message)
+{
+    if (QThread::currentThread() != thread())
+    {
+        QMetaObject::invokeMethod(
+            this,
+            [this, prefix, message]() { appendMessage(prefix, message); },
+            Qt::QueuedConnection
+        );
+        return;
+    }
+
+    publishEntry(prefix + " " + currentTimestamp() + " " + message.trimmed());
+}
+
+void ApplicationLogger::appendCoreOutput(const QString &output)
+{
+    if (QThread::currentThread() != thread())
+    {
+        QMetaObject::invokeMethod(
+            this,
+            [this, output]() { appendCoreOutput(output); },
+            Qt::QueuedConnection
+        );
+        return;
+    }
+
+    QStringList lines = output.split('\n', Qt::KeepEmptyParts);
+    for (QString &line : lines)
+    {
+        line.prepend("[CORE] ");
+    }
+    publishEntry(lines.join('\n'));
+}
+
+void ApplicationLogger::qtMessageHandler(
+    QtMsgType type,
+    const QMessageLogContext &context,
+    const QString &message
+)
+{
+    Q_UNUSED(context)
+
+    QMutexLocker locker(&messageHandlerMutex);
+    if (messageHandlerTarget != nullptr)
+    {
+        messageHandlerTarget->appendQtMessage(type, message);
+    }
+}
+
+void ApplicationLogger::appendQtMessage(QtMsgType type, const QString &message)
+{
+    appendMessage("[" + messageTypeName(type) + "]", message);
+}
+
+void ApplicationLogger::publishEntry(const QString &entry)
+{
+    emit entryAdded(entry);
+    writeStandardOutput(entry);
+}
+
+void ApplicationLogger::writeStandardOutput(const QString &output)
+{
+    standardOutput << output;
+    if (!output.endsWith('\n'))
+    {
+        standardOutput << '\n';
+    }
+    standardOutput.flush();
+}
diff --git a/application/applicationlogger.h b/application/applicationlogger.h
new file mode 100644
index 0000000..efc091b
--- /dev/null
+++ b/application/applicationlogger.h
@@ -0,0 +1,37 @@
+#ifndef APPLICATIONLOGGER_H
+#define APPLICATIONLOGGER_H
+
+#include <QLoggingCategory>
+#include <QObject>
+#include <QTextStream>
+
+class ApplicationLogger : public QObject
+{
+Q_OBJECT
+
+public:
+    explicit ApplicationLogger(QObject *parent = nullptr);
+    ~ApplicationLogger() override;
+
+    void appendCoreOutput(const QString &output);
+
+signals:
+    void entryAdded(const QString &entry);
+
+private:
+    static void qtMessageHandler(
+        QtMsgType type,
+        const QMessageLogContext &context,
+        const QString &message
+    );
+
+    void appendQtMessage(QtMsgType type, const QString &message);
+    void appendMessage(const QString &prefix, const QString &message);
+    void publishEntry(const QString &entry);
+    void writeStandardOutput(const QString &output);
+
+    QTextStream standardOutput;
+    QtMessageHandler previousMessageHandler = nullptr;
+};
+
+#endif // APPLICATIONLOGGER_H
diff --git a/authinfowindow/authinfowindow.cpp b/authinfowindow/authinfowindow.cpp
index 6b31704..1e830f4 100644
--- a/authinfowindow/authinfowindow.cpp
+++ b/authinfowindow/authinfowindow.cpp
@@ -1,8 +1,11 @@
 #include "authinfowindow.h"
 
 #include "utils/utils.h"
-#include "mainwindow.h"
 
+#include <QDebug>
+#include <QJsonArray>
+#include <QJsonDocument>
+#include <QJsonObject>
 #include <QMessageBox>
 #include <QPushButton>
 #include <QKeyEvent>
@@ -34,14 +37,13 @@ AuthInfoWindow::AuthInfoWindow(QWidget *parent)
     connect(proc_, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished), this,
             [this](int exitCode, QProcess::ExitStatus exitStatus) {
                 QString output = Utils::consoleOutputToQString(stdoutBuf_);
-                if (mainWindow)
-                    mainWindow->addLog("可用认证方式：\n" + output);
+                qInfo().noquote() << "可用认证方式：\n" + output;
                 QJsonParseError jsonError;
                 QJsonDocument doc = QJsonDocument::fromJson(output.toUtf8(), &jsonError);
-                if (jsonError.error != QJsonParseError::NoError && mainWindow)
-                    mainWindow->addLog("解析可用认证方式失败：" + jsonError.errorString());
-                if (!doc.isArray() && mainWindow)
-                    mainWindow->addLog("解析可用认证方式失败：可用认证方式不是列表");
+                if (jsonError.error != QJsonParseError::NoError)
+                    qWarning().noquote() << "解析可用认证方式失败：" + jsonError.errorString();
+                if (!doc.isArray())
+                    qWarning().noquote() << "解析可用认证方式失败：可用认证方式不是列表";
                 QJsonArray arr = doc.array();
                 for (QJsonValueRef v : arr) {
                     QJsonObject obj = v.toObject();
@@ -58,12 +60,10 @@ AuthInfoWindow::AuthInfoWindow(QWidget *parent)
                 }
             });
     connect(proc_, &QProcess::errorOccurred, this, [this](QProcess::ProcessError error) {
-        mainWindow->addLog(QString("获取可用认证方式失败：") + QMetaEnum::fromType<QProcess::ProcessError>().valueToKey(error));
+        qWarning().noquote()
+            << QString("获取可用认证方式失败：")
+                   + QMetaEnum::fromType<QProcess::ProcessError>().valueToKey(error);
     });
-
-    mainWindow = qobject_cast<MainWindow *>(parent);
-    if (!mainWindow)
-        mainWindow = qobject_cast<MainWindow *>(parent->parent());
 }
 
 AuthInfoWindow::~AuthInfoWindow()
@@ -77,8 +77,5 @@ void AuthInfoWindow::fetchAuthInfo(const QString& serverAddress, int port)
     stderrBuf_.clear();
     proc_->start(Utils::getCorePath(),
                  {"-protocol", "atrust", "-server", serverAddress, "-port", QString::number(port), "-auth-info"});
-    if (mainWindow)
-    {
-        mainWindow->addLog("正在获取可用认证的方式...");
-    }
+    qInfo().noquote() << "正在获取可用认证的方式...";
 }
diff --git a/authinfowindow/authinfowindow.h b/authinfowindow/authinfowindow.h
index 36b6df8..3927bd0 100644
--- a/authinfowindow/authinfowindow.h
+++ b/authinfowindow/authinfowindow.h
@@ -4,8 +4,6 @@
 #include <QDialog>
 #include <QProcess>
 
-class MainWindow;
-
 class AuthInfoWindow : public QDialog
 {
 	Q_OBJECT
@@ -22,7 +20,6 @@ signals:
 
 private:
 	Ui::AuthInfoWindow *ui;
-    MainWindow *mainWindow = nullptr;
     QProcess *proc_ = nullptr;
     QByteArray stdoutBuf_;
     QByteArray stderrBuf_;
diff --git a/infrastructure/corelogfile.cpp b/infrastructure/corelogfile.cpp
new file mode 100644
index 0000000..c24fec0
--- /dev/null
+++ b/infrastructure/corelogfile.cpp
@@ -0,0 +1,59 @@
+#include "corelogfile.h"
+
+#include <QMetaObject>
+#include <QThread>
+
+CoreLogFile::CoreLogFile(const QString &filePath, QObject *parent)
+    : QObject(parent),
+      file(filePath)
+{
+    if (file.open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Truncate))
+    {
+        stream.setDevice(&file);
+        stream.setEncoding(QStringConverter::Utf8);
+    }
+}
+
+CoreLogFile::~CoreLogFile()
+{
+    if (file.isOpen())
+    {
+        stream.flush();
+        file.close();
+    }
+}
+
+QString CoreLogFile::filePath() const
+{
+    return file.fileName();
+}
+
+bool CoreLogFile::isOpen() const
+{
+    return file.isOpen();
+}
+
+void CoreLogFile::appendOutput(const QString &output)
+{
+    if (QThread::currentThread() != thread())
+    {
+        QMetaObject::invokeMethod(
+            this,
+            [this, output]() { appendOutput(output); },
+            Qt::QueuedConnection
+        );
+        return;
+    }
+
+    if (!file.isOpen())
+    {
+        return;
+    }
+
+    stream << output;
+    if (!output.endsWith('\n'))
+    {
+        stream << '\n';
+    }
+    stream.flush();
+}
diff --git a/infrastructure/corelogfile.h b/infrastructure/corelogfile.h
new file mode 100644
index 0000000..7c5a3a1
--- /dev/null
+++ b/infrastructure/corelogfile.h
@@ -0,0 +1,26 @@
+#ifndef CORELOGFILE_H
+#define CORELOGFILE_H
+
+#include <QFile>
+#include <QObject>
+#include <QTextStream>
+
+class CoreLogFile : public QObject
+{
+Q_OBJECT
+
+public:
+    explicit CoreLogFile(const QString &filePath, QObject *parent = nullptr);
+    ~CoreLogFile() override;
+
+    QString filePath() const;
+    bool isOpen() const;
+
+    void appendOutput(const QString &output);
+
+private:
+    QFile file;
+    QTextStream stream;
+};
+
+#endif // CORELOGFILE_H
diff --git a/main.cpp b/main.cpp
index 50fb552..4d51c08 100644
--- a/main.cpp
+++ b/main.cpp
@@ -2,6 +2,7 @@
 
 #include "SingleApplication"
 
+#include "application/applicationlogger.h"
 #include "mainwindow.h"
 #include "utils/utils.h"
 
@@ -17,6 +18,8 @@ int main(int argc, char *argv[])
     QApplication::setApplicationVersion(PROJ_VER);
     QLocale::setDefault(QLocale(QLocale::Chinese, QLocale::SimplifiedChineseScript, QLocale::China));
 
+    ApplicationLogger applicationLogger;
+
 #if defined(Q_OS_WINDOWS)
     QApplication::setFont(QFont("Microsoft YaHei UI", QApplication::font().pointSize()));
 #endif
@@ -35,7 +38,7 @@ int main(int argc, char *argv[])
     else
         qDebug() << "Failed to load transaction file for" << translateModule;
 
-    MainWindow mainWindow;
+    MainWindow mainWindow(&applicationLogger);
 
     QObject::connect(&app, &SingleApplication::aboutToQuit, &mainWindow, &MainWindow::cleanUpWhenQuit);
 
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 109b5ea..34f803a 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -5,6 +5,7 @@
 #include <QNetworkInterface>
 #include <QClipboard>
 #include <QDesktopServices>
+#include <QDebug>
 #include <QFileInfo>
 #include <QCoreApplication>
 #include <QActionGroup>
@@ -12,13 +13,16 @@
 
 #include "mainwindow.h"
 
+#include "application/applicationlogger.h"
+#include "infrastructure/corelogfile.h"
 #include "ui_mainwindow.h"
 #include "utils/utils.h"
 #include "zjuconnectcontroller/zjuconnectcontroller.h"
 
-MainWindow::MainWindow(QWidget *parent) :
+MainWindow::MainWindow(ApplicationLogger *logger, QWidget *parent) :
     QMainWindow(parent),
-    ui(new Ui::MainWindow)
+    ui(new Ui::MainWindow),
+    applicationLogger(logger)
 {
     profileManager = new ProfileManager();
     const QString overrideConfigPath = Utils::getArgValue(QCoreApplication::arguments(), "--config-path");
@@ -39,6 +43,12 @@ MainWindow::MainWindow(QWidget *parent) :
     isFirstTimeSetMode = true;
 
     ui->setupUi(this);
+    coreLogFile = new CoreLogFile(Utils::getLogFilePath(), this);
+    connect(applicationLogger, &ApplicationLogger::entryAdded, this,
+            [this](const QString &entry)
+            {
+                ui->logPlainTextEdit->appendPlainText(entry);
+            });
     systemProxySession = new SystemProxySession(this);
     connect(systemProxySession, &SystemProxySession::busyChanged, this,
             [this](bool busy)
@@ -92,9 +102,9 @@ MainWindow::MainWindow(QWidget *parent) :
 
     // 文件-打开日志文件
     connect(ui->openLogAction, &QAction::triggered, this,
-            [&]()
+            [this]()
             {
-                QString logFilePath = Utils::getLogFilePath();
+                const QString logFilePath = coreLogFile->filePath();
                 QFileInfo logFileInfo(logFilePath);
 
                 if (logFileInfo.exists())
@@ -103,7 +113,7 @@ MainWindow::MainWindow(QWidget *parent) :
                 }
                 else
                 {
-                    QMessageBox::information(this, "日志文件", "日志文件还未生成，请先启动 VPN 连接。");
+                    QMessageBox::warning(this, "日志文件", "日志文件创建失败。");
                 }
             });
 
@@ -129,7 +139,7 @@ MainWindow::MainWindow(QWidget *parent) :
                         {
                             if (!enabled)
                             {
-                                addLog("已清理系统代理设置");
+                                qInfo().noquote() << "已清理系统代理设置";
                             }
                         },
                         Qt::SingleShotConnection);
@@ -154,7 +164,7 @@ MainWindow::MainWindow(QWidget *parent) :
                 }
 
                 Utils::clearClientData(currentProfileId);
-                addLog("已清理登录缓存");
+                qInfo().noquote() << "已清理登录缓存";
             });
 
     // 文件-设置授信设备
@@ -168,12 +178,12 @@ MainWindow::MainWindow(QWidget *parent) :
                         settings->value("ZJUConnect/ServerAddress").toString(),
                         settings->value("ZJUConnect/ServerPort").toInt(),
                         currentProfileId, true);
-                    addLog("设置授信设备成功");
+                    qInfo().noquote() << "设置授信设备成功";
                     QMessageBox::information(this, "成功", "已设置授信设备");
                 }
                 catch (const std::runtime_error &e)
                 {
-                    addLog("设置授信设备失败：" + QString(e.what()));
+                    qWarning().noquote() << "设置授信设备失败：" + QString(e.what());
                     QMessageBox::critical(this, "错误", "设置授信设备失败：\n" + QString(e.what()));
                 }
             });
@@ -189,12 +199,12 @@ MainWindow::MainWindow(QWidget *parent) :
                         settings->value("ZJUConnect/ServerAddress").toString(),
                         settings->value("ZJUConnect/ServerPort").toInt(),
                         currentProfileId, false);
-                    addLog("取消授信设备成功");
+                    qInfo().noquote() << "取消授信设备成功";
                     QMessageBox::information(this, "成功", "已取消授信设备");
                 }
                 catch (const std::runtime_error &e)
                 {
-                    addLog("取消授信设备失败：" + QString(e.what()));
+                    qWarning().noquote() << "取消授信设备失败：" + QString(e.what());
                     QMessageBox::critical(this, "错误", "取消授信设备失败：\n" + QString(e.what()));
                 }
             });
@@ -267,7 +277,7 @@ MainWindow::MainWindow(QWidget *parent) :
         this, [&](QNetworkReply* reply) {
             if (reply->error() != QNetworkReply::NoError)
             {
-                addLog("检查 UI 更新失败。原因是：" + reply->errorString());
+                qWarning().noquote() << "检查 UI 更新失败。原因是：" + reply->errorString();
                 ui->versionLabel->setText(
                     "当前版本：" + QApplication::applicationVersion() + "\n检查 UI 更新失败\n"
                 );
@@ -286,7 +296,7 @@ MainWindow::MainWindow(QWidget *parent) :
             {
                 latestVersion = latestVersion.mid(1);
             }
-            addLog("检查 UI 更新成功。最新版本：" + latestVersion);
+            qInfo().noquote() << "检查 UI 更新成功。最新版本：" + latestVersion;
 			versionInfo.ui_latest = latestVersion;
 			updateVersionInfo();
 
@@ -319,7 +329,7 @@ MainWindow::MainWindow(QWidget *parent) :
         this, [&](QNetworkReply* reply) {
             if (reply->error() != QNetworkReply::NoError)
             {
-                addLog("检查核心更新失败。原因是：" + reply->errorString());
+                qWarning().noquote() << "检查核心更新失败。原因是：" + reply->errorString();
                 ui->versionLabel->setText(
                     "当前版本：" + QApplication::applicationVersion() + "\n检查核心更新失败\n"
                 );
@@ -338,7 +348,7 @@ MainWindow::MainWindow(QWidget *parent) :
             {
                 latestVersion = latestVersion.mid(1);
             }
-            addLog("检查核心更新成功。最新版本：" + latestVersion);
+            qInfo().noquote() << "检查核心更新成功。最新版本：" + latestVersion;
             versionInfo.core_latest = latestVersion;
             updateVersionInfo();
 
@@ -349,7 +359,7 @@ MainWindow::MainWindow(QWidget *parent) :
             if (latestVersionQ > nowVersionQ ||
                 (latestVersionQ == nowVersionQ && latestVersion.right(latestVersionSuffix) != nowVersion.right(nowVersionSuffix)))
             {
-                addLog("核心版本存在更新，可手动更新或通知开发者更新。");
+                qInfo().noquote() << "核心版本存在更新，可手动更新或通知开发者更新。";
             }
         });
 
@@ -404,12 +414,6 @@ void MainWindow::changeEvent(QEvent *event)
     }
 }
 
-void MainWindow::addLog(const QString &log)
-{
-    QString timeString = QDateTime::currentDateTime().toString("yyyy/MM/dd hh:mm:ss");
-    ui->logPlainTextEdit->appendPlainText(timeString + " " + log.trimmed());
-}
-
 void MainWindow::clearLog()
 {
     ui->logPlainTextEdit->clear();
@@ -624,7 +628,7 @@ bool MainWindow::switchProfile(const QString &profileId)
     clearLog();
     refreshProfileMenu();
 
-    addLog("已切换到配置：" + currentProfileId);
+    qInfo().noquote() << "已切换到配置：" + currentProfileId;
     return true;
 }
 
@@ -700,7 +704,7 @@ void MainWindow::renameCurrentProfile()
     updateVersionInfo();
     refreshProfileMenu();
     clearLog();
-    addLog("当前配置已重命名为：" + currentProfileId);
+    qInfo().noquote() << "当前配置已重命名为：" + currentProfileId;
 }
 
 void MainWindow::deleteCurrentProfile()
@@ -740,7 +744,7 @@ void MainWindow::deleteCurrentProfile()
     }
 
     refreshProfileMenu();
-    addLog("已删除配置：" + removedProfileId);
+    qInfo().noquote() << "已删除配置：" + removedProfileId;
 }
 
 void MainWindow::checkUpdate()
@@ -748,11 +752,11 @@ void MainWindow::checkUpdate()
     try
     {
         versionInfo.core_version = Utils::checkCoreVersion(this);
-		addLog("检查核心版本成功：" + versionInfo.core_version);
+		qInfo().noquote() << "检查核心版本成功：" + versionInfo.core_version;
     }
     catch (const std::runtime_error& e)
     {
-        addLog("检查核心版本失败：" + QString(e.what()));
+        qWarning().noquote() << "检查核心版本失败：" + QString(e.what());
         versionInfo.core_version = "错误";
     }
     QNetworkRequest request(QUrl("https://api.github.com/repos/" + Utils::REPO_NAME + "/releases/latest"));
diff --git a/mainwindow.h b/mainwindow.h
index 048e32a..5384168 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -24,17 +24,18 @@ namespace Ui
     class MainWindow;
 }
 
+class ApplicationLogger;
+class CoreLogFile;
+
 class MainWindow : public QMainWindow
 {
 Q_OBJECT
 
 public:
-    explicit MainWindow(QWidget *parent = nullptr);
+    explicit MainWindow(ApplicationLogger *logger, QWidget *parent = nullptr);
 
     ~MainWindow() override;
 
-    void addLog(const QString &log);
-
 public slots:
 
     void cleanUpWhenQuit();
@@ -100,6 +101,8 @@ private:
     QAction *deleteProfileAction;
     ConnectionSession *connectionSession = nullptr;
     SystemProxySession *systemProxySession = nullptr;
+    ApplicationLogger *applicationLogger;
+    CoreLogFile *coreLogFile = nullptr;
     QNetworkAccessManager *checkUpdateNAM;
     QNetworkAccessManager *checkCoreUpdateNAM;
     QSettings *settings;
diff --git a/tests/applicationlogger_test.cpp b/tests/applicationlogger_test.cpp
new file mode 100644
index 0000000..1f6e5fb
--- /dev/null
+++ b/tests/applicationlogger_test.cpp
@@ -0,0 +1,60 @@
+#include <QCoreApplication>
+#include <QDebug>
+#include <QLoggingCategory>
+#include <QRegularExpression>
+#include <QThread>
+
+#include "application/applicationlogger.h"
+
+Q_LOGGING_CATEGORY(backgroundLog, "logger.background")
+
+namespace
+{
+bool publishesQtAndCoreEntries()
+{
+    QStringList entries;
+    {
+        ApplicationLogger logger;
+        QObject::connect(&logger, &ApplicationLogger::entryAdded,
+                         [&entries](const QString &entry) { entries.append(entry); });
+
+        qInfo().noquote() << "application event";
+        QThread *loggingThread = QThread::create(
+            []() { qCWarning(backgroundLog).noquote() << "background warning"; }
+        );
+        loggingThread->start();
+        loggingThread->wait();
+        delete loggingThread;
+        QCoreApplication::processEvents();
+
+        logger.appendCoreOutput("standard output\ncontinued standard output");
+        logger.appendCoreOutput("error output");
+    }
+
+    const QString timestampPattern = R"(\d{4}/\d{2}/\d{2} \d{2}:\d{2}:\d{2})";
+    const bool entriesArePublished = entries.size() == 4
+        && QRegularExpression(
+               "^\\[INFO\\] " + timestampPattern + " application event$"
+           ).match(entries.at(0)).hasMatch()
+        && QRegularExpression(
+               "^\\[WARNING\\] " + timestampPattern + " background warning$"
+           ).match(entries.at(1)).hasMatch()
+        && entries.at(2) == "[CORE] standard output\n[CORE] continued standard output"
+        && entries.at(3) == "[CORE] error output";
+
+    if (!entriesArePublished)
+    {
+        qCritical() << "publishesQtAndCoreEntries failed";
+        return false;
+    }
+    return true;
+}
+}
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app(argc, argv);
+    QCoreApplication::setApplicationName("LoggerTest");
+    QCoreApplication::setApplicationVersion("1.0");
+    return publishesQtAndCoreEntries() ? 0 : 1;
+}
diff --git a/tests/corelogfile_test.cpp b/tests/corelogfile_test.cpp
new file mode 100644
index 0000000..db1da24
--- /dev/null
+++ b/tests/corelogfile_test.cpp
@@ -0,0 +1,53 @@
+#include <QCoreApplication>
+#include <QDebug>
+#include <QFile>
+#include <QTemporaryDir>
+
+#include "infrastructure/corelogfile.h"
+
+namespace
+{
+bool writesOnlyRawCoreOutput()
+{
+    QTemporaryDir temporaryDirectory;
+    if (!temporaryDirectory.isValid())
+    {
+        qCritical() << "Unable to create temporary directory";
+        return false;
+    }
+
+    const QString logPath = temporaryDirectory.filePath("core.log");
+    {
+        CoreLogFile logFile(logPath);
+        if (!logFile.isOpen() || logFile.filePath() != logPath)
+        {
+            qCritical() << "Core log file did not open the requested path";
+            return false;
+        }
+
+        logFile.appendOutput("standard output\ncontinued standard output");
+        logFile.appendOutput("error output");
+    }
+
+    QFile logFile(logPath);
+    if (!logFile.open(QIODevice::ReadOnly | QIODevice::Text))
+    {
+        qCritical() << "Unable to read generated core log";
+        return false;
+    }
+
+    const QString contents = QString::fromUtf8(logFile.readAll());
+    if (contents != "standard output\ncontinued standard output\nerror output\n")
+    {
+        qCritical().noquote() << "writesOnlyRawCoreOutput failed:\n" << contents;
+        return false;
+    }
+    return true;
+}
+}
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app(argc, argv);
+    return writesOnlyRawCoreOutput() ? 0 : 1;
+}
diff --git a/zjuconnectcontroller/zjuconnectcontroller.cpp b/zjuconnectcontroller/zjuconnectcontroller.cpp
index 2ebc842..950e4d5 100644
--- a/zjuconnectcontroller/zjuconnectcontroller.cpp
+++ b/zjuconnectcontroller/zjuconnectcontroller.cpp
@@ -3,9 +3,8 @@
 #include "core/coreoutputparser.h"
 #include "utils/utils.h"
 #include <qcontainerfwd.h>
-#include <QCoreApplication>
+#include <QDebug>
 #include <QDir>
-#include <QFile>
 #include <QFileInfo>
 #include <QStandardPaths>
 
@@ -13,19 +12,6 @@ ZjuConnectController::ZjuConnectController(QObject *parent) : QObject(parent)
 {
     zjuConnectProcess = new QProcess(this);
 
-    // 初始化日志文件
-    logFile = new QFile(Utils::getLogFilePath());
-    if (logFile->open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Truncate))
-    {
-        logStream = new QTextStream(logFile);
-        logStream->setEncoding(QStringConverter::Utf8);
-        QString startMsg = "=== Log started at " + QDateTime::currentDateTime().toString("yyyy/MM/dd hh:mm:ss") +
-                           " with " + QCoreApplication::applicationName() + " " + QCoreApplication::applicationVersion() +
-                           " ===\n";
-        *logStream << startMsg;
-        logStream->flush();
-    }
-
     connect(zjuConnectProcess, &QProcess::readyReadStandardOutput, this, [this]()
     {
         processOutput(standardOutputBuffer, zjuConnectProcess->readAllStandardOutput());
@@ -42,13 +28,12 @@ ZjuConnectController::ZjuConnectController(QObject *parent) : QObject(parent)
         {
             return;
         }
-        QString timeString = QDateTime::currentDateTime().toString("yyyy/MM/dd hh:mm:ss");
         QString errorString = zjuConnectProcess->errorString();
-        emit outputRead(timeString + " 退出原因：" + errorString);
+        qWarning().noquote() << "退出原因：" + errorString;
 
         if (errorString.contains("No such file or directory") || errorString.contains("not found") || errorString.contains("找不到"))
         {
-            emit outputRead(timeString + " 核心路径：" + zjuConnectProcess->program());
+            qWarning().noquote() << "核心路径：" + zjuConnectProcess->program();
             emit error(ZJU_ERROR::PROGRAM_NOT_FOUND);
         }
     });
@@ -58,8 +43,7 @@ ZjuConnectController::ZjuConnectController(QObject *parent) : QObject(parent)
         processOutput(standardOutputBuffer, zjuConnectProcess->readAllStandardOutput(), true);
         processOutput(standardErrorBuffer, zjuConnectProcess->readAllStandardError(), true);
         stopRequested = false;
-        QString timeString = QDateTime::currentDateTime().toString("yyyy/MM/dd hh:mm:ss");
-        emit outputRead(timeString + " 退出原因：" "进程已结束");
+        qInfo().noquote() << "退出原因：进程已结束";
         emit finished();
     });
 }
@@ -96,12 +80,6 @@ void ZjuConnectController::processOutputLines(const QList<QByteArray> &lines)
     const QString output = outputLines.join('\n');
     emit outputRead(output);
 
-    if (logStream != nullptr)
-    {
-        *logStream << output << '\n';
-        logStream->flush();
-    }
-
     for (const QString &line : outputLines)
     {
         switch (CoreOutputParser::parse(line))
@@ -225,16 +203,15 @@ void ZjuConnectController::start(const ConnectionProfile &profile)
     }
 
     const CoreCommand command = CoreCommandBuilder::build(profile, runtimePaths);
-    QString timeString = QDateTime::currentDateTime().toString("yyyy/MM/dd hh:mm:ss");
-    emit outputRead(timeString + " VPN 启动！参数：" + command.loggableArguments.join(' '));
+    qInfo().noquote() << "VPN 启动！参数：" + command.loggableArguments.join(' ');
 
     if (!profile.credentials.totpSecret.isEmpty())
     {
-        emit outputRead(timeString + " 使用了 TOTP");
+        qInfo().noquote() << "使用了 TOTP";
     }
     if (!profile.credentials.certFile.isEmpty())
     {
-        emit outputRead(timeString + " 使用了证书文件");
+        qInfo().noquote() << "使用了证书文件";
     }
 
     QString programToStart = profile.program;
@@ -292,24 +269,4 @@ void ZjuConnectController::writeInput(const QByteArray &data)
 ZjuConnectController::~ZjuConnectController()
 {
     stop();
-
-    // 关闭日志文件
-    if (logStream != nullptr)
-    {
-        QString endMsg = "=== Log ended at " + QDateTime::currentDateTime().toString("yyyy/MM/dd hh:mm:ss") + " ===\n";
-        *logStream << endMsg;
-        logStream->flush();
-        delete logStream;
-        logStream = nullptr;
-    }
-
-    if (logFile != nullptr)
-    {
-        if (logFile->isOpen())
-        {
-            logFile->close();
-        }
-        delete logFile;
-        logFile = nullptr;
-    }
 }
diff --git a/zjuconnectcontroller/zjuconnectcontroller.h b/zjuconnectcontroller/zjuconnectcontroller.h
index 79e67e8..f134899 100644
--- a/zjuconnectcontroller/zjuconnectcontroller.h
+++ b/zjuconnectcontroller/zjuconnectcontroller.h
@@ -55,8 +55,6 @@ private:
 
     QString graphFile;
 
-    QFile *logFile = nullptr;
-    QTextStream *logStream = nullptr;
     CoreOutputBuffer standardOutputBuffer;
     CoreOutputBuffer standardErrorBuffer;
     bool stopRequested = false;
diff --git a/zjuconnectmode.cpp b/zjuconnectmode.cpp
index 194fe9f..f76c3f3 100644
--- a/zjuconnectmode.cpp
+++ b/zjuconnectmode.cpp
@@ -1,6 +1,7 @@
 #include <QMessageBox>
 #include <QCheckBox>
 #include <QDialogButtonBox>
+#include <QDebug>
 #include <QInputDialog>
 #include <QLabel>
 #include <QLineEdit>
@@ -8,6 +9,8 @@
 #include <QApplication>
 
 #include "mainwindow.h"
+#include "application/applicationlogger.h"
+#include "infrastructure/corelogfile.h"
 #include "ui_mainwindow.h"
 #include "sudowindow/sudowindow.h"
 #include "loginwindow/loginwindow.h"
@@ -28,14 +31,13 @@ void MainWindow::initZjuConnect()
     resetZjuConnectUi();
 
     // 连接服务器
-    connect(connectionSession, &ConnectionSession::outputRead, this,
-        [&](const QString &output)
-        {
-            ui->logPlainTextEdit->appendPlainText(output);
-        });
+    connect(connectionSession, &ConnectionSession::outputRead,
+            applicationLogger, &ApplicationLogger::appendCoreOutput);
+    connect(connectionSession, &ConnectionSession::outputRead,
+            coreLogFile, &CoreLogFile::appendOutput);
 
     connect(connectionSession, &ConnectionSession::savedSudoPasswordRejected, this,
-            [&]() { addLog("sudo 密码可能有误，不使用记住的密码"); });
+            [&]() { qWarning().noquote() << "sudo 密码可能有误，不使用记住的密码"; });
 
     connect(connectionSession, &ConnectionSession::askSudoPass, this,
         [&]()
@@ -50,18 +52,18 @@ void MainWindow::initZjuConnect()
 
     connect(connectionSession, &ConnectionSession::graphCaptcha, this,
         [&](const QString &graphFile) {
-            addLog("需要图形验证码");
+            qInfo().noquote() << "需要图形验证码";
             graphCaptchaWindow = new GraphCaptchaWindow(this);
             graphCaptchaWindow->setGraph(graphFile);
             graphCaptchaWindow->show();
             connect(graphCaptchaWindow, &GraphCaptchaWindow::finishCaptcha, this, [&](const QByteArray &captcha) {
-                addLog("图形验证码已提交");
+                qInfo().noquote() << "图形验证码已提交";
                 connectionSession->submitInput(captcha + "\n");
             });
         });
 
     connect(connectionSession, &ConnectionSession::smsCode, this, [&](bool showSkipSecondaryAuthOption) {
-        addLog("需要短信验证码");
+        qInfo().noquote() << "需要短信验证码";
 
         QDialog smsCodeDialog(this);
         smsCodeDialog.setWindowTitle("短信验证码");
@@ -93,11 +95,12 @@ void MainWindow::initZjuConnect()
 
         if (smsCodeAccepted)
         {
-            addLog(skipSecondaryAuth ? "短信验证码已提交（跳过以后的短信验证）" : "短信验证码已提交");
+            qInfo().noquote()
+                << (skipSecondaryAuth ? "短信验证码已提交（跳过以后的短信验证）" : "短信验证码已提交");
         }
         else
         {
-            addLog("短信验证码输入已取消");
+            qInfo().noquote() << "短信验证码输入已取消";
         }
         QByteArray smsCodeInput = smsCode.toLocal8Bit();
         if (skipSecondaryAuth)
@@ -108,11 +111,11 @@ void MainWindow::initZjuConnect()
     });
 
     connect(connectionSession, &ConnectionSession::totpCode, this, [&]() {
-        addLog("需要 TOTP 验证码");
+        qInfo().noquote() << "需要 TOTP 验证码";
         bool accepted = false;
         QString totp = QInputDialog::getText(
             this, "TOTP 验证码", "请输入 TOTP 验证码：", QLineEdit::Normal, "", &accepted);
-        addLog(accepted ? "TOTP 验证码已提交" : "TOTP 验证码输入已取消");
+        qInfo().noquote() << (accepted ? "TOTP 验证码已提交" : "TOTP 验证码输入已取消");
         connectionSession->submitInput(totp.toLocal8Bit() + "\n");
     });
 
@@ -134,7 +137,7 @@ void MainWindow::initZjuConnect()
         if (ssoUrl.startsWith("/"))
             ssoUrl = "https://" + serverHost + ssoUrl;
 
-        addLog(QStringLiteral("单点登录：") + ssoUrl);
+        qInfo().noquote() << QStringLiteral("单点登录：") + ssoUrl;
         ssoLoginWebView->setInitialUrl(QUrl::fromUserInput(ssoUrl));
         ssoLoginWebView->setCallbackServerHost(serverHost);
         ssoLoginWebView->show();
@@ -142,12 +145,12 @@ void MainWindow::initZjuConnect()
 
     connect(connectionSession, &ConnectionSession::reconnectScheduled, this, [&](int)
     {
-        addLog("正在尝试重新连接...");
+        qInfo().noquote() << "正在尝试重新连接...";
     });
 
     connect(connectionSession, &ConnectionSession::finished, this, [&](ZJU_ERROR error)
     {
-        addLog("VPN 断开！");
+        qInfo().noquote() << "VPN 断开！";
         if (error != ZJU_ERROR::NONE)
         {
             showNotification("VPN", "VPN 意外断开！", QSystemTrayIcon::MessageIcon::Warning);
@@ -322,7 +325,7 @@ void MainWindow::initZjuConnect()
                                     ).toBool();
                                     if (suppressed)
                                     {
-                                        addLog("跳过系统代理覆盖警告，因为已设置了不再提示");
+                                        qInfo().noquote() << "跳过系统代理覆盖警告，因为已设置了不再提示";
                                     }
                                     else
                                     {
@@ -350,10 +353,9 @@ void MainWindow::initZjuConnect()
                                     }
                                 }
 
-                                addLog(
-                                    "设置系统代理：HTTP端口 " + QString::number(http_port)
-                                    + "，SOCKS5 端口 " + QString::number(socks_port)
-                                );
+                                qInfo().noquote()
+                                    << "设置系统代理：HTTP端口 " + QString::number(http_port)
+                                           + "，SOCKS5 端口 " + QString::number(socks_port);
                                 systemProxySession->enable(proxyConfig);
                             },
                             Qt::SingleShotConnection);