diff --git a/RedPandaIDE/RedPandaIDE.pro b/RedPandaIDE/RedPandaIDE.pro
index aca74fd6..5b8e677a 100644
--- a/RedPandaIDE/RedPandaIDE.pro
+++ b/RedPandaIDE/RedPandaIDE.pro
@@ -130,6 +130,7 @@ SOURCES += \
     debugger/gdbmidebugger.cpp \
     debugger/gdbmiresultparser.cpp \
     debugger/dapprotocol.cpp \
+    debugger/dapdebugger.cpp \    
     cpprefacter.cpp \
     parser/cppparser.cpp \
     parser/cpppreprocessor.cpp \
@@ -261,6 +262,7 @@ HEADERS += \
     debugger/gdbmidebugger.h \
     debugger/gdbmiresultparser.h \
     debugger/dapprotocol.h \    
+    debugger/dapdebugger.h \    
     cpprefacter.h \
     customfileiconprovider.h \
     parser/cppparser.h \
diff --git a/RedPandaIDE/debugger/dapdebugger.cpp b/RedPandaIDE/debugger/dapdebugger.cpp
new file mode 100644
index 00000000..95711491
--- /dev/null
+++ b/RedPandaIDE/debugger/dapdebugger.cpp
@@ -0,0 +1,88 @@
+#include "dapdebugger.h"
+#include "../utils.h"
+#include "dapprotocol.h"
+#include "../systemconsts.h"
+
+#include <QFileInfo>
+
+DAPDebuggerClient::DAPDebuggerClient(Debugger *debugger, QObject *parent):
+    DebuggerClient{debugger, parent}
+{
+
+}
+
+void DAPDebuggerClient::run()
+{
+    mStop = false;
+    bool errorOccured = false;
+    mInferiorRunning = false;
+    mProcessExited = false;
+    QString cmd = debuggerPath();
+//    QString arguments = "--annotate=2";
+    QStringList arguments{"--interpret=mi", "--silent"};
+    QString workingDir = QFileInfo(debuggerPath()).path();
+
+    mProcess = std::make_shared<QProcess>();
+    auto action = finally([&]{
+        mProcess.reset();
+    });
+    mProcess->setProgram(cmd);
+    mProcess->setArguments(arguments);
+
+    QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
+    QString path = env.value("PATH");
+    QStringList pathAdded = binDirs();
+    if (!path.isEmpty()) {
+        path = pathAdded.join(PATH_SEPARATOR) + PATH_SEPARATOR + path;
+    } else {
+        path = pathAdded.join(PATH_SEPARATOR);
+    }
+    QString cmdDir = extractFileDir(cmd);
+    if (!cmdDir.isEmpty()) {
+        path = cmdDir + PATH_SEPARATOR + path;
+    }
+    env.insert("PATH",path);
+    mProcess->setProcessEnvironment(env);
+
+    mProcess->setWorkingDirectory(workingDir);
+
+    connect(mProcess.get(), &QProcess::errorOccurred,
+                    [&](){
+                        errorOccured= true;
+                    });
+    QByteArray buffer;
+    QByteArray readed;
+
+    mProcess->start();
+    mProcess->waitForStarted(5000);
+    mStartSemaphore.release(1);
+    while (true) {
+        mProcess->waitForFinished(1);
+        if (mProcess->state()!=QProcess::Running) {
+            break;
+        }
+        if (mStop) {
+            mProcess->terminate();
+            mProcess->kill();
+            break;
+        }
+        if (errorOccured)
+            break;
+        readed = mProcess->readAll();
+        buffer += readed;
+
+        if (readed.endsWith("\n")&& outputTerminated(buffer)) {
+            processDebugOutput(buffer);
+            buffer.clear();
+            mCmdRunning = false;
+            runNextCmd();
+        } else if (!mCmdRunning && readed.isEmpty()){
+            runNextCmd();
+        } else if (readed.isEmpty()){
+            msleep(1);
+        }
+    }
+    if (errorOccured) {
+        emit processFailed(mProcess->error());
+    }
+}
diff --git a/RedPandaIDE/debugger/dapdebugger.h b/RedPandaIDE/debugger/dapdebugger.h
new file mode 100644
index 00000000..8e28d8fd
--- /dev/null
+++ b/RedPandaIDE/debugger/dapdebugger.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2020-2022 Roy Qu (royqh1979@gmail.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#ifndef DAP_DEBUGGER_H
+#define DAP_DEBUGGER_H
+
+#include "debugger.h"
+
+class DAPDebuggerClient : public DebuggerClient {
+    Q_OBJECT
+public:
+    explicit DAPDebuggerClient(Debugger* debugger, QObject *parent = nullptr);
+
+
+    // QThread interface
+protected:
+    void run() override;
+
+    // DebuggerClient interface
+public:
+    void postCommand(const QString &Command, const QString &Params, DebugCommandSource Source) override;
+    void registerInferiorStoppedCommand(const QString &Command, const QString &Params) override;
+    void stopDebug() override;
+
+protected:
+    void runNextCmd() override;
+private:
+    void initializeRequest();
+private:
+    std::shared_ptr<QProcess> mProcess;
+    bool mStop;
+};
+
+#endif
diff --git a/RedPandaIDE/debugger/dapprotocol.h b/RedPandaIDE/debugger/dapprotocol.h
index ead48aca..f21c9545 100644
--- a/RedPandaIDE/debugger/dapprotocol.h
+++ b/RedPandaIDE/debugger/dapprotocol.h
@@ -57,6 +57,9 @@ QString createDAPResponseMessage(
         qint64 seq, qint64 request_seq, bool success,
         const QString& command, const QString& message, const QJsonObject& body);
 
+QString createDAPEventMessage(
+        qint64 seq, const QString& event, const QJsonObject& body);
+
 std::shared_ptr<DAPProtocolMessage> parseDAPMessage(const QByteArray& contentPart);
 
 #endif
diff --git a/RedPandaIDE/debugger/debugger.cpp b/RedPandaIDE/debugger/debugger.cpp
index 044b6add..c43b5ddb 100644
--- a/RedPandaIDE/debugger/debugger.cpp
+++ b/RedPandaIDE/debugger/debugger.cpp
@@ -270,12 +270,14 @@ void Debugger::updateRegisterValues(const QHash<int, QString> &values)
 void Debugger::refreshAll()
 {
     refreshWatchVars();
-    sendCommand("-stack-list-variables", "--all-values");
-    if (memoryModel()->startAddress()>0)
-        sendCommand("-data-read-memory",QString("%1 x 1 %2 %3 ")
-                    .arg(memoryModel()->startAddress())
-                    .arg(pSettings->debugger().memoryViewRows())
-                    .arg(pSettings->debugger().memoryViewColumns())
+    if (mExecuting && mClient)
+        mClient->refreshStackVariables();
+    if (memoryModel()->startAddress()>0
+            && mExecuting && mClient)
+        mClient->readMemory(
+                    memoryModel()->startAddress(),
+                    pSettings->debugger().memoryViewRows(),
+                    pSettings->debugger().memoryViewColumns()
                     );
 }
 
@@ -314,7 +316,9 @@ bool Debugger::inferiorRunning()
 
 void Debugger::interrupt()
 {
-    sendCommand("-exec-interrupt", "");
+    if (mExecuting && mClient) {
+        mClient->interrupt();
+    }
 }
 
 bool Debugger::isForProject() const
@@ -437,13 +441,8 @@ PBreakpoint Debugger::breakpointAt(int line, const Editor *editor, int *index)
 void Debugger::setBreakPointCondition(int index, const QString &condition, bool forProject)
 {
     PBreakpoint breakpoint=mBreakpointModel->setBreakPointCondition(index,condition, forProject);
-    if (condition.isEmpty()) {
-        sendCommand("-break-condition",
-                    QString("%1").arg(breakpoint->number));
-    } else {
-        sendCommand("-break-condition",
-                    QString("%1 %2").arg(breakpoint->number).arg(condition));
-    }
+    if (mExecuting && mClient)
+        mClient->setBreakpointCondition(breakpoint);
 }
 
 void Debugger::sendAllBreakpointsToDebugger()
@@ -495,8 +494,8 @@ void Debugger::loadForProject(const QString &filename, const QString &projectFol
 void Debugger::addWatchpoint(const QString &expression)
 {
     QString s=expression.trimmed();
-    if (!s.isEmpty()) {
-        sendCommand("-break-watch",s,DebugCommandSource::Other);
+    if (mExecuting && mClient) {
+        mClient->addWatchpoint(expression);
     }
 }
 
@@ -545,12 +544,12 @@ void Debugger::modifyWatchVarExpression(const QString &oldExpr, const QString &n
 
 void Debugger::refreshWatchVars()
 {
-    if (mExecuting) {
+    if (mExecuting && mClient) {
         sendAllWatchVarsToDebugger();
         if (mDebuggerType==DebuggerType::LLDB_MI) {
             for (PWatchVar var:mWatchModel->watchVars()) {
                 if (!var->name.isEmpty())
-                    sendCommand("-var-update",QString(" --all-values %1").arg(var->name));
+                    mClient->refreshWatchVar(var);
             }
         } else {
             sendCommand("-var-update"," --all-values *");
@@ -1003,23 +1002,6 @@ DebuggerClient::DebuggerClient(Debugger* debugger, QObject *parent) : QThread(pa
     mCmdRunning = false;
 }
 
-void DebuggerClient::clearCmdQueue()
-{
-    QMutexLocker locker(&mCmdQueueMutex);
-    mCmdQueue.clear();
-}
-
-void DebuggerClient::runInferiorStoppedHook()
-{
-    QMutexLocker locker(&mCmdQueueMutex);
-    foreach (const PDebugCommand& cmd, mInferiorStoppedHookCommands) {
-        mCmdQueue.push_front(cmd);
-    }
-}
-
-
-
-
 const QStringList &DebuggerClient::binDirs() const
 {
     return mBinDirs;
@@ -1065,11 +1047,6 @@ bool DebuggerClient::updateCPUInfo() const
     return mUpdateCPUInfo;
 }
 
-const PDebugCommand &DebuggerClient::currentCmd() const
-{
-    return mCurrentCmd;
-}
-
 const QStringList &DebuggerClient::consoleOutput() const
 {
     return mConsoleOutput;
diff --git a/RedPandaIDE/debugger/debugger.h b/RedPandaIDE/debugger/debugger.h
index 5562212e..202f9162 100644
--- a/RedPandaIDE/debugger/debugger.h
+++ b/RedPandaIDE/debugger/debugger.h
@@ -45,13 +45,6 @@ enum class DebuggerType {
     DAP
 };
 
-struct DebugCommand{
-    QString command;
-    QString params;
-    DebugCommandSource source;
-};
-
-using PDebugCommand = std::shared_ptr<DebugCommand>;
 struct WatchVar;
 using  PWatchVar = std::shared_ptr<WatchVar>;
 struct WatchVar {
@@ -482,8 +475,6 @@ public:
 
     const QStringList &consoleOutput() const;
 
-    const PDebugCommand &currentCmd() const;
-
     bool updateCPUInfo() const;
 
     bool receivedSFWarning() const;
@@ -501,6 +492,15 @@ public:
     void addBinDir(const QString &binDir);
 
     Debugger* debugger() { return mDebugger; }
+
+    //requests
+    virtual void interrupt() = 0;
+    virtual void refreshStackVariables() = 0;
+    virtual void readMemory(qulonglong startAddress, int rows, int cols) = 0;
+    virtual void setBreakpointCondition(PBreakpoint breakpoint) = 0;
+    virtual void addWatchpoint(const QString& watchExp) = 0;
+    virtual void refreshWatchVar(PWatchVar var) = 0;
+
 signals:
     void parseStarted();
     void invalidateAllVars();
@@ -540,21 +540,18 @@ signals:
     void varsValueUpdated();
 protected:
     virtual void runNextCmd() = 0;
-    void clearCmdQueue();
-    void runInferiorStoppedHook();
 protected:
 #if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
     QRecursiveMutex mCmdQueueMutex;
 #else
     QMutex mCmdQueueMutex;
 #endif
-    QQueue<PDebugCommand> mCmdQueue;
+
     bool mCmdRunning;
 
-    QList<PDebugCommand> mInferiorStoppedHookCommands;
     bool mInferiorRunning;
     bool mProcessExited;
-    PDebugCommand mCurrentCmd;
+
     QStringList mConsoleOutput;
     QStringList mFullOutput;
     QSemaphore mStartSemaphore;
diff --git a/RedPandaIDE/debugger/gdbmidebugger.cpp b/RedPandaIDE/debugger/gdbmidebugger.cpp
index fb5610e0..f195d12c 100644
--- a/RedPandaIDE/debugger/gdbmidebugger.cpp
+++ b/RedPandaIDE/debugger/gdbmidebugger.cpp
@@ -860,4 +860,65 @@ void GDBMIDebuggerClient::asyncUpdate()
     mAsyncUpdated = false;
 }
 
+const PDebugCommand &GDBMIDebuggerClient::currentCmd() const
+{
+    return mCurrentCmd;
+}
 
+void GDBMIDebuggerClient::interrupt()
+{
+    postCommand("-exec-interrupt", "", DebugCommandSource::Other);
+}
+
+void GDBMIDebuggerClient::refreshStackVariables()
+{
+    postCommand("-stack-list-variables", "--all-values", DebugCommandSource::Other);
+}
+
+void GDBMIDebuggerClient::readMemory(qulonglong startAddress, int rows, int cols)
+{
+    postCommand("-data-read-memory",QString("%1 x 1 %2 %3 ")
+                .arg(startAddress)
+                .arg(rows)
+                .arg(cols),
+                DebugCommandSource::Other
+                );
+}
+
+void GDBMIDebuggerClient::setBreakpointCondition(PBreakpoint breakpoint)
+{
+    Q_ASSERT(breakpoint!=nullptr);
+    QString condition = breakpoint->condition;
+    if (condition.isEmpty()) {
+        postCommand("-break-condition",
+                    QString("%1").arg(breakpoint->number), DebugCommandSource::Other);
+    } else {
+        postCommand("-break-condition",
+                    QString("%1 %2").arg(breakpoint->number).arg(condition), DebugCommandSource::Other);
+    }
+}
+
+void GDBMIDebuggerClient::addWatchpoint(const QString &watchExp)
+{
+    if (!watchExp.isEmpty())
+        postCommand("-break-watch", watchExp, DebugCommandSource::Other);
+}
+
+void GDBMIDebuggerClient::refreshWatchVar(PWatchVar var)
+{
+
+}
+
+void GDBMIDebuggerClient::runInferiorStoppedHook()
+{
+    QMutexLocker locker(&mCmdQueueMutex);
+    foreach (const PDebugCommand& cmd, mInferiorStoppedHookCommands) {
+        mCmdQueue.push_front(cmd);
+    }
+}
+
+void GDBMIDebuggerClient::clearCmdQueue()
+{
+    QMutexLocker locker(&mCmdQueueMutex);
+    mCmdQueue.clear();
+}
diff --git a/RedPandaIDE/debugger/gdbmidebugger.h b/RedPandaIDE/debugger/gdbmidebugger.h
index 20111eb8..6d8c1127 100644
--- a/RedPandaIDE/debugger/gdbmidebugger.h
+++ b/RedPandaIDE/debugger/gdbmidebugger.h
@@ -27,6 +27,14 @@
 #include <memory>
 #include <QRegularExpression>
 
+struct DebugCommand{
+    QString command;
+    QString params;
+    DebugCommandSource source;
+};
+
+using PDebugCommand = std::shared_ptr<DebugCommand>;
+
 class GDBMIDebuggerClient: public DebuggerClient {
     Q_OBJECT
 public:
@@ -37,6 +45,14 @@ public:
     void postCommand(const QString &Command, const QString &Params, DebugCommandSource Source) override;
     void registerInferiorStoppedCommand(const QString &Command, const QString &Params) override;
     void stopDebug() override;
+    const PDebugCommand &currentCmd() const;
+
+    void interrupt() override;
+    void refreshStackVariables() override;
+    void readMemory(qulonglong startAddress, int rows, int cols) override;
+    void setBreakpointCondition(PBreakpoint breakpoint) override;
+    void addWatchpoint(const QString& watchExp) override;
+    void refreshWatchVar(PWatchVar var) override;
     // QThread interface
 protected:
     void run() override;
@@ -63,6 +79,8 @@ private:
     void processResultRecord(const QByteArray& line);
     void processDebugOutput(const QByteArray& debugOutput);
     QByteArray removeToken(const QByteArray& line) const;
+    void runInferiorStoppedHook();
+    void clearCmdQueue();
 private slots:
     void asyncUpdate();
 private:
@@ -77,6 +95,11 @@ private:
     bool mAsyncUpdated;
 
     static const QRegularExpression REGdbSourceLine;
+
+    QQueue<PDebugCommand> mCmdQueue;
+    PDebugCommand mCurrentCmd;
+    QList<PDebugCommand> mInferiorStoppedHookCommands;
+
 };
 
 #endif // GDBMI_DEBUGGER_H