diff --git a/NEWS.md b/NEWS.md
index 011136b5..e6c971ab 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -4,6 +4,8 @@ Red Panda C++ Version 1.5
   - enhancement: add/new/remove/rename project files won't rebuild project tree
   - fix: gliches in UI's left panel in some OS
   - fix: correctly restore project layout when reopen it
+  - change: clear tools output panel when start to compile
+  - change: don't show syntax check messages in the tools output panel
 
 Red Panda C++ Version 1.4
 
diff --git a/RedPandaIDE/compiler/compiler.cpp b/RedPandaIDE/compiler/compiler.cpp
index ce485c3f..6f02c465 100644
--- a/RedPandaIDE/compiler/compiler.cpp
+++ b/RedPandaIDE/compiler/compiler.cpp
@@ -207,7 +207,7 @@ void Compiler::processOutput(QString &line)
     if(mLastIssue && line.startsWith(referencePrefix)) {
             line.remove(0,referencePrefix.length());
             mLastIssue->filename = getFileNameFromOutputLine(line);
-            qDebug()<<line;
+            //qDebug()<<line;
             mLastIssue->line = getLineNumberFromOutputLine(line);
             emit compileIssue(mLastIssue);
             mLastIssue.reset();
@@ -352,7 +352,7 @@ QString Compiler::getCharsetArgument(const QByteArray& encoding,FileType fileTyp
         } else {
             execEncodingName = compilerSetExecCharset;
         }
-        qDebug()<<encodingName<<execEncodingName;
+        //qDebug()<<encodingName<<execEncodingName;
         if (checkSyntax) {
             result += QString(" -finput-charset=%1")
                     .arg(encodingName);
diff --git a/RedPandaIDE/compiler/compilermanager.cpp b/RedPandaIDE/compiler/compilermanager.cpp
index 06772f3c..7d522513 100644
--- a/RedPandaIDE/compiler/compilermanager.cpp
+++ b/RedPandaIDE/compiler/compilermanager.cpp
@@ -87,6 +87,7 @@ void CompilerManager::compile(const QString& filename, const QByteArray& encodin
         connect(mCompiler, &Compiler::compileFinished, this, &CompilerManager::onCompileFinished);
         connect(mCompiler, &Compiler::compileIssue, this, &CompilerManager::onCompileIssue);
         connect(mCompiler, &Compiler::compileStarted, pMainWindow, &MainWindow::onCompileStarted);
+        connect(mCompiler, &Compiler::compileStarted, pMainWindow, &MainWindow::clearToolsOutput);
 
         connect(mCompiler, &Compiler::compileOutput, pMainWindow, &MainWindow::logToolsOutput);
         connect(mCompiler, &Compiler::compileIssue, pMainWindow, &MainWindow::onCompileIssue);
@@ -117,6 +118,7 @@ void CompilerManager::compileProject(std::shared_ptr<Project> project, bool rebu
 
         connect(mCompiler, &Compiler::compileIssue, this, &CompilerManager::onCompileIssue);
         connect(mCompiler, &Compiler::compileStarted, pMainWindow, &MainWindow::onCompileStarted);
+        connect(mCompiler, &Compiler::compileStarted, pMainWindow, &MainWindow::clearToolsOutput);
 
         connect(mCompiler, &Compiler::compileOutput, pMainWindow, &MainWindow::logToolsOutput);
         connect(mCompiler, &Compiler::compileIssue, pMainWindow, &MainWindow::onCompileIssue);
@@ -149,6 +151,7 @@ void CompilerManager::cleanProject(std::shared_ptr<Project> project)
 
         connect(mCompiler, &Compiler::compileIssue, this, &CompilerManager::onCompileIssue);
         connect(mCompiler, &Compiler::compileStarted, pMainWindow, &MainWindow::onCompileStarted);
+        connect(mCompiler, &Compiler::compileStarted, pMainWindow, &MainWindow::clearToolsOutput);
 
         connect(mCompiler, &Compiler::compileOutput, pMainWindow, &MainWindow::logToolsOutput);
         connect(mCompiler, &Compiler::compileIssue, pMainWindow, &MainWindow::onCompileIssue);
@@ -199,7 +202,7 @@ void CompilerManager::checkSyntax(const QString &filename, const QByteArray& enc
         connect(mBackgroundSyntaxChecker, &Compiler::compileIssue, this, &CompilerManager::onSyntaxCheckIssue);
         connect(mBackgroundSyntaxChecker, &Compiler::compileStarted, pMainWindow, &MainWindow::onCompileStarted);
         connect(mBackgroundSyntaxChecker, &Compiler::compileFinished, this, &CompilerManager::onSyntaxCheckFinished);
-        connect(mBackgroundSyntaxChecker, &Compiler::compileOutput, pMainWindow, &MainWindow::logToolsOutput);
+        //connect(mBackgroundSyntaxChecker, &Compiler::compileOutput, pMainWindow, &MainWindow::logToolsOutput);
         connect(mBackgroundSyntaxChecker, &Compiler::compileIssue, pMainWindow, &MainWindow::onCompileIssue);
         connect(mBackgroundSyntaxChecker, &Compiler::compileErrorOccured, pMainWindow, &MainWindow::onCompileErrorOccured);
         mBackgroundSyntaxChecker->start();
diff --git a/RedPandaIDE/mainwindow.ui b/RedPandaIDE/mainwindow.ui
index 62977126..469397b8 100644
--- a/RedPandaIDE/mainwindow.ui
+++ b/RedPandaIDE/mainwindow.ui
@@ -895,7 +895,7 @@
      <enum>QTabWidget::South</enum>
     </property>
     <property name="currentIndex">
-     <number>6</number>
+     <number>1</number>
     </property>
     <property name="iconSize">
      <size>