diff --git a/Gui/Control/ConnectControl.cpp b/Gui/Control/ConnectControl.cpp
index 4a7750c..7d64907 100644
--- a/Gui/Control/ConnectControl.cpp
+++ b/Gui/Control/ConnectControl.cpp
@@ -162,7 +162,7 @@ void Connecter::InitControl()
         }
         auto name = item->text();
         ui->elbClient->setText(name);
-        ui->elbClient->setStyleSheet("color: blue;");
+        ui->elbClient->setStyleSheet("color: green;");
         remoteCall_(name);
     });
 
diff --git a/Gui/Control/LogControl.cpp b/Gui/Control/LogControl.cpp
index 1774fc1..7ac4ff5 100644
--- a/Gui/Control/LogControl.cpp
+++ b/Gui/Control/LogControl.cpp
@@ -12,10 +12,14 @@ LogPrint::LogPrint(QWidget* parent) : QWidget(parent), ui(new Ui::LogPrint)
 {
     ui->setupUi(this);
     InitControl();
+    InitColor();
 }
 
 void LogPrint::InitControl()
 {
+    isLightMode_ = QGuiApplication::styleHints()->colorScheme() == Qt::ColorScheme::Light;
+    styleHints_ = QGuiApplication::styleHints();
+    connect(styleHints_, &QStyleHints::colorSchemeChanged, this, &LogPrint::ColorChange);
     ui->pedText->setReadOnly(true);
 }
 
@@ -32,33 +36,80 @@ std::string LogPrint::now_str()
     return timestamp.str();
 }
 
+void LogPrint::ColorChange(Qt::ColorScheme scheme)
+{
+    if (scheme == Qt::ColorScheme::Dark) {
+        isLightMode_ = false;
+    } else {
+        isLightMode_ = true;
+    }
+    RePrintLog();
+}
+
 LogPrint::~LogPrint()
 {
     delete ui;
 }
 
+static const QColor DARK_INFO_COLOR = QColor(255, 255, 0);
+static const QColor DARK_WARN_COLOR = QColor(255, 102, 0);
+static const QColor DARK_ERROR_COLOR = QColor(255, 0, 255);
+static const QColor DARK_DEBUG_COLOR = QColor(0, 255, 255);
+
+void LogPrint::InitColor()
+{
+    lightMap_[PT_INFO] = Qt::black;
+    lightMap_[PT_WARN] = Qt::blue;
+    lightMap_[PT_ERROR] = Qt::red;
+    lightMap_[PT_DEBUG] = Qt::gray;
+
+    darkMap_[PT_INFO] = DARK_INFO_COLOR;
+    darkMap_[PT_WARN] = DARK_WARN_COLOR;
+    darkMap_[PT_ERROR] = DARK_ERROR_COLOR;
+    darkMap_[PT_DEBUG] = DARK_DEBUG_COLOR;
+}
+
+void LogPrint::RePrintLog()
+{
+    {
+        QMutexLocker locker(&mutex_);
+        ui->pedText->clear();
+    }
+
+    for (auto& entry : logEntries_) {
+        Print(entry.message, entry.level, false);
+    }
+}
+
 void LogPrint::Info(const QString& message)
 {
-    Print(message, Qt::black);
+    Print(message, PT_INFO);
 }
 void LogPrint::Warn(const QString& message)
 {
-    Print(message, Qt::gray);
+    Print(message, PT_WARN);
 }
 void LogPrint::Error(const QString& message)
 {
-    Print(message, Qt::red);
+    Print(message, PT_ERROR);
 }
 void LogPrint::Debug(const QString& message)
 {
-    Print(message, Qt::blue);
+    Print(message, PT_DEBUG);
 }
-void LogPrint::Print(const QString& message, const QBrush& color)
-{
-    QString timeStr = QString("%1%2").arg(QString::fromStdString(now_str())).arg(message);
 
-    QString coloredLog = QString("<span style='color:%1;'>%2</span>")
-                             .arg(color.color().name())
-                             .arg(timeStr.toHtmlEscaped());
-    ui->pedText->appendHtml(coloredLog);
+void LogPrint::Print(const QString& message, PrintType type, bool recordHis)
+{
+    QMutexLocker locker(&mutex_);
+    QString timeStr = QString("%1%2").arg(QString::fromStdString(now_str())).arg(message);
+    QString r;
+    if (isLightMode_) {
+        r = QString("<span style='color:%1;'>%2</span>").arg(lightMap_[type].color().name()).arg(timeStr.toHtmlEscaped());
+    } else {
+        r = QString("<span style='color:%1;'>%2</span>").arg(darkMap_[type].color().name()).arg(timeStr.toHtmlEscaped());
+    }
+    if (recordHis) {
+        logEntries_.append({message, type});
+    }
+    ui->pedText->appendHtml(r);
 }
diff --git a/Gui/Control/LogControl.h b/Gui/Control/LogControl.h
index 5feeae2..2bd2a22 100644
--- a/Gui/Control/LogControl.h
+++ b/Gui/Control/LogControl.h
@@ -1,14 +1,25 @@
-#ifndef LOGCONTROL_H
+#ifndef LOGCONTROL_H
 #define LOGCONTROL_H
 
 #include <QBrush>
+#include <QGuiApplication>
+#include <QMap>
+#include <QMutex>
 #include <QStandardItemModel>
+#include <QStyleHints>
 #include <QWidget>
 
 namespace Ui {
 class LogPrint;
 }
 
+enum PrintType { PT_INFO, PT_WARN, PT_ERROR, PT_DEBUG };
+
+struct LogEntry {
+    QString message;
+    PrintType level;
+};
+
 class LogPrint : public QWidget
 {
     Q_OBJECT
@@ -25,13 +36,22 @@ public:
 
 public:
     std::string now_str();
+    void ColorChange(Qt::ColorScheme scheme);
 
 private:
     void InitControl();
-    void Print(const QString& message, const QBrush& color);
+    void InitColor();
+    void RePrintLog();
+    void Print(const QString& message, PrintType type, bool recordHis = true);
 
 private:
+    QMutex mutex_;
+    bool isLightMode_{true};
     Ui::LogPrint* ui;
+    QMap<PrintType, QBrush> lightMap_;
+    QMap<PrintType, QBrush> darkMap_;
+    QVector<LogEntry> logEntries_;
+    QStyleHints* styleHints_{};
     QStandardItemModel* model_;
 };
 
diff --git a/Server/Server.cpp b/Server/Server.cpp
index 3044ce1..bc1ef78 100644
--- a/Server/Server.cpp
+++ b/Server/Server.cpp
@@ -26,7 +26,7 @@ bool Server::startServer(quint16 port)
     }
 
     qDebug() << "Server started on port" << serverPort();
-    monitorTimer_->start(30000);
+    monitorTimer_->start(300000);
     id_ = QString("0.0.0.0:%1").arg(serverPort());
     return true;
 }