diff --git a/src/frame/qqtapplication.cpp b/src/frame/qqtapplication.cpp
index b48a5ea0..2b85e581 100644
--- a/src/frame/qqtapplication.cpp
+++ b/src/frame/qqtapplication.cpp
@@ -1,4 +1,4 @@
-#include "qqtapplication.h"
+#include "qqtapplication.h"
 #ifdef __PLUGINWATCHER__
 #include "qqtpluginwatcher.h"
 #endif
@@ -135,7 +135,7 @@ void QQtApplication::setUPanAutorun ( bool run )
 void QQtApplication::setWriteLogSystem ( bool open )
 {
     /*设置日志系统*/
-#ifdef __QQTLOGFILESUPPORT__
+#ifdef __QQTLOGSYSTEMSUPPORT__
 
     if ( open )
     {
diff --git a/src/network/qqtsocketudpclient.cpp b/src/network/qqtsocketudpclient.cpp
index dd39fa43..2dbcb8a7 100644
--- a/src/network/qqtsocketudpclient.cpp
+++ b/src/network/qqtsocketudpclient.cpp
@@ -1,5 +1,4 @@
-#include "qqtsocketudpclient.h"
-#include <QNetworkDatagram>
+#include "qqtsocketudpclient.h"
 
 QQtSocketUdpClient::QQtSocketUdpClient ( QObject* parent ) : QUdpSocket ( parent )
 {
@@ -30,8 +29,12 @@ void QQtSocketUdpClient::installProtocol ( QQtUdpProtocol* stack )
         return;
 
     m_protocol = stack;
+    connect ( m_protocol, SIGNAL ( writeDatagram ( QByteArray, QHostAddress, quint16 ) ),
+              this, SLOT ( slotWriteDatagram ( QByteArray, QHostAddress, quint16 ) ) );
+#if QT_VERSION > QT_VERSION_CHECK(5,0,0)
     connect ( m_protocol, SIGNAL ( writeDatagram ( const QNetworkDatagram& ) ),
               this, SLOT ( slotWriteDatagram ( const QNetworkDatagram& ) ) );
+#endif
 }
 
 void QQtSocketUdpClient::uninstallProtocol ( QQtUdpProtocol* stack )
@@ -41,8 +44,12 @@ void QQtSocketUdpClient::uninstallProtocol ( QQtUdpProtocol* stack )
     if ( !m_protocol )
         return;
 
+    disconnect ( m_protocol, SIGNAL ( writeDatagram ( QByteArray, QHostAddress, quint16 ) ),
+                 this, SLOT ( slotWriteDatagram ( QByteArray, QHostAddress, quint16 ) ) );
+#if QT_VERSION > QT_VERSION_CHECK(5,0,0)
     disconnect ( m_protocol, SIGNAL ( writeDatagram ( const QNetworkDatagram& ) ),
                  this, SLOT ( slotWriteDatagram ( const QNetworkDatagram& ) ) );
+#endif
     m_protocol = NULL;
 }
 
@@ -67,21 +74,21 @@ void QQtSocketUdpClient::socketStateChanged ( QAbstractSocket::SocketState eSock
 
     switch ( eSocketState )
     {
-    case QAbstractSocket::HostLookupState:
-    case QAbstractSocket::ConnectingState:
-        break;
+        case QAbstractSocket::HostLookupState:
+        case QAbstractSocket::ConnectingState:
+            break;
 
-    case QAbstractSocket::ConnectedState:
-        break;
+        case QAbstractSocket::ConnectedState:
+            break;
 
-    case QAbstractSocket::ClosingState:
-        break;
+        case QAbstractSocket::ClosingState:
+            break;
 
-    case QAbstractSocket::UnconnectedState:
-        break;
+        case QAbstractSocket::UnconnectedState:
+            break;
 
-    default:
-        break;
+        default:
+            break;
     }
 }
 
@@ -99,13 +106,13 @@ void QQtSocketUdpClient::socketErrorOccured ( QAbstractSocket::SocketError e )
 
     switch ( e )
     {
-    case QAbstractSocket::RemoteHostClosedError:
-        break;
+        case QAbstractSocket::RemoteHostClosedError:
+            break;
 
-    case QAbstractSocket::HostNotFoundError:
-    default:
-        emit signalConnectFail();
-        break;
+        case QAbstractSocket::HostNotFoundError:
+        default:
+            emit signalConnectFail();
+            break;
     }
 }
 
@@ -137,28 +144,41 @@ void QQtSocketUdpClient::updateProgress ( qint64 bytes )
     //pline() << bytes;
 }
 
-qint64 QQtSocketUdpClient::slotWriteDatagram ( const QNetworkDatagram& datagram )
-{
-    return writeDatagram ( datagram );
-}
-
 void QQtSocketUdpClient::readyReadData()
 {
-    /*为什么用while?*/
+    /*为什么用while?*/ //Qt4 没有那么高级的一次性读取的接口
     while ( hasPendingDatagrams() )
     {
+        QByteArray bytes;
+        qint64 maxlen = 0;
+        QHostAddress host;
+        quint16 port;
+
         qint64 size = pendingDatagramSize();
+        //这里的buf用完, 已经释放。
+        char* data = new char[size + 1]();
+        qint64 len = readDatagram ( data, size, &host, &port );
+        pline() << len;
+        bytes.setRawData ( data, size );
+        delete[] data;
+
+        m_protocol->translator ( bytes, host, port );
+
+#if QT_VERSION > QT_VERSION_CHECK(5,0,0)
         /*能够一次收够一条报文？测试的能。*/
-        QNetworkDatagram da = receiveDatagram();
+        QNetworkDatagram datagram;
+        //datagrame = receiveDatagram();
+        /*由于添加了兼容Qt4的代码，以上注释起来。*/
+        datagram.setData ( bytes );
+        datagram.setSender ( host, port );
 
         /*数据无意义 "" -1 在此设置*/
-        da.setDestination(this->localAddress(), this->localPort());
-
-        //pline() << "udp sender:" << da.senderAddress() << da.senderPort();
-        //pline() << "udp receiver:" << da.destinationAddress() << da.destinationPort();
+        datagram.setDestination ( this->localAddress(), this->localPort() );
+        //pline() << "udp sender:" << datagram.senderAddress() << datagram.senderPort();
+        //pline() << "udp receiver:" << datagram.destinationAddress() << datagram.destinationPort();
         //pline() << "udp new msg size:" << size;
-
-        m_protocol->translator ( da );
+        m_protocol->translator ( datagram );
+#endif
     }
 }
 
diff --git a/src/network/qqtsocketudpclient.h b/src/network/qqtsocketudpclient.h
index b7f1e217..315d2db8 100644
--- a/src/network/qqtsocketudpclient.h
+++ b/src/network/qqtsocketudpclient.h
@@ -1,4 +1,4 @@
-#ifndef QQTUDPCLIENT_H
+#ifndef QQTUDPCLIENT_H
 #define QQTUDPCLIENT_H
 
 #include <QUdpSocket>
@@ -40,7 +40,17 @@ private slots:
     void socketConnected();
     void socketDisconnect();
     void updateProgress ( qint64 bytes );
-    qint64 slotWriteDatagram ( const QNetworkDatagram& datagram );
+    //如果有一个同名的槽，参数不同，并且被用宏控制起来，Qt编译不过。
+    //Qt的元对象系统，解析信号和槽函数，不支持宏。
+    qint64 slotWriteDatagram ( const QByteArray& datagram,
+                               const QHostAddress& host, quint16 port ) {
+        return writeDatagram ( datagram, host, port );
+    }
+#if QT_VERSION > QT_VERSION_CHECK(5,0,0)
+    qint64 slotWriteDatagram ( const QNetworkDatagram& datagram ) {
+        return writeDatagram ( datagram );
+    }
+#endif
 
 private:
     QQtUdpProtocol* m_protocol;
diff --git a/src/network/qqtudpprotocol.cpp b/src/network/qqtudpprotocol.cpp
index d182ed46..727f77fb 100644
--- a/src/network/qqtudpprotocol.cpp
+++ b/src/network/qqtudpprotocol.cpp
@@ -1,11 +1 @@
-#include "qqtudpprotocol.h"
-
-QQtUdpProtocol::QQtUdpProtocol ( QObject* parent ) : QObject ( parent )
-{
-
-}
-
-void QQtUdpProtocol::translator ( const QNetworkDatagram& dg )
-{
-    dispatcher ( dg );
-}
+#include "qqtudpprotocol.h"
diff --git a/src/network/qqtudpprotocol.h b/src/network/qqtudpprotocol.h
index 6c93680c..bd4d8da9 100644
--- a/src/network/qqtudpprotocol.h
+++ b/src/network/qqtudpprotocol.h
@@ -1,11 +1,14 @@
-#ifndef QQTUDPPROTOCOL_H
+#ifndef QQTUDPPROTOCOL_H
 #define QQTUDPPROTOCOL_H
 
 #include <QObject>
 #include <qqt-local.h>
 #include "qqtmessage.h"
 #include "qqtcore.h"
+
+#if QT_VERSION > QT_VERSION_CHECK(5,0,0)
 #include <QNetworkDatagram>
+#endif
 
 /*
 */
@@ -13,11 +16,20 @@ class QQTSHARED_EXPORT QQtUdpProtocol : public QObject
 {
     Q_OBJECT
 public:
-    explicit QQtUdpProtocol ( QObject* parent = nullptr );
+    explicit QQtUdpProtocol ( QObject* parent = nullptr ) : QObject ( parent ) {
+
+    }
     virtual ~QQtUdpProtocol() {}
 
 signals:
-    qint64 writeDatagram ( const QNetworkDatagram& );
+    qint64 writeDatagram ( const QByteArray& datagram,
+                           const QHostAddress& host, quint16 port );
+#if QT_VERSION > QT_VERSION_CHECK(5,0,0)
+    qint64 writeDatagram ( const QNetworkDatagram& datagram ) {
+        //emit writeDatagram();
+    }
+#endif
+
 public slots:
 protected:
     /**
@@ -26,7 +38,13 @@ protected:
      * @param 数据包
      * @return 0 no dispatched(others) 1 dispatched(own)
      */
+    inline virtual bool dispatcher ( const QByteArray& datagram,
+                                     const QHostAddress& host, quint16 port ) {
+        return 0;
+    }
+#if QT_VERSION > QT_VERSION_CHECK(5,0,0)
     inline virtual bool dispatcher ( const QNetworkDatagram& ) { return 0; }
+#endif
 public:
     /**
      * @brief 协议处理器
@@ -34,7 +52,15 @@ public:
      * @param Qt通讯口readAll()读到的bytes
      * @return
      */
-    void translator ( const QNetworkDatagram& dg );
+    void translator ( const QByteArray& datagram,
+                      const QHostAddress& host, quint16 port ) {
+        dispatcher ( datagram, host, port );
+    }
+#if QT_VERSION > QT_VERSION_CHECK(5,0,0)
+    void translator ( const QNetworkDatagram& datagram ) {
+        dispatcher ( datagram );
+    }
+#endif
 };
 
 #endif // QQTUDPPROTOCOL_H
diff --git a/src/qqt_header.pri b/src/qqt_header.pri
index 99c2eb26..758f91dd 100644
--- a/src/qqt_header.pri
+++ b/src/qqt_header.pri
@@ -148,7 +148,7 @@ contains (DEFINES, __CPP11__) {
 
 ##################MultiMedia Module###############################
 DEFINES += __MULTIMEDIA__
-#on mac qt has no multimedia
+#on mac qt4 has no multimedia
 contains(QKIT_PRIVATE, macOS) {
     lessThan(QT_MAJOR_VERSION, 5):DEFINES-=__MULTIMEDIA__
 }
@@ -220,10 +220,13 @@ contains (DEFINES, __EXQUISITE__) {
 ##################WebSocket Module###############################
 #don't close this macro ...
 DEFINES += __TCPUDPSOCKET__
+
 #if you use Qt Service Support ( QtSoap ), open this annotation
 DEFINES += __WEBSERVICESUPPORT__
+
 #One Ftp Http 单工...
 #Multi 半双工（客户端并发，服务器序列） QNetworkAccessManager
+#QNetworkAccessManager 提供多路并发 HTTP session。
 #if you use QNetworkAccessManagerSupport , open this annotation
 DEFINES += __WEBACCESSSUPPORT__
 lessThan(QT_MAJOR_VERSION, 5): DEFINES -= __WEBACCESSSUPPORT__
@@ -231,6 +234,7 @@ contains(QKIT_PRIVATE, ARM32||MIPS32||EMBEDDED):DEFINES -= __WEBACCESSSUPPORT__
 contains (DEFINES, __WEBACCESSSUPPORT__) {
     #QSslError not found, you need recompiler Qt4
 }
+
 DEFINES += __WEBKITSUPPORT__
 contains (DEFINES, __WEBKITSUPPORT__) {
     #TODO: QT += webkit
@@ -267,10 +271,10 @@ DEFINES += __CUSTOMPLOT__
 ##################Mathes Module###############################
 DEFINES += __MATHSUPPORT__
 
-##################QQtLogFile Module###############################
-DEFINES += __QQTLOGFILESUPPORT__
+##################QQtLogSystem Module###############################
+DEFINES += __QQTLOGSYSTEMSUPPORT__
 
-##################################################################
+#################################################################
 ##library
 ##################################################################
 equals (QKIT_PRIVATE, iOSSimulator):{
diff --git a/src/qqt_source.pri b/src/qqt_source.pri
index 16798f42..4bbe0ed6 100644
--- a/src/qqt_source.pri
+++ b/src/qqt_source.pri
@@ -227,30 +227,28 @@ FORMS += \
 #network
 SOURCES += \
     $$PWD/network/qqtprotocol.cpp \
+    $$PWD/network/qqtudpprotocol.cpp \
     $$PWD/network/qqtnetwork.cpp
 HEADERS += \
     $$PWD/network/qqtmessage.h \
     $$PWD/network/qqtprotocol.h \
+    $$PWD/network/qqtudpprotocol.h \
     $$PWD/network/qqtnetwork.h
 
-#tcpsocket
-SOURCES += \
-    $$PWD/network/qqtsockettcpclient.cpp \
-    $$PWD/network/qqtsockettcpserver.cpp
-HEADERS += \
-    $$PWD/network/qqtsockettcpclient.h \
-    $$PWD/network/qqtsockettcpserver.h
-
-#udpsocket
-!contains(QKIT_PRIVATE, MIPS32||ARM32) {
+#tcpudpsocket
+contains(DEFINES, __TCPUDPSOCKET__){
+    SOURCES += \
+        $$PWD/network/qqtsockettcpclient.cpp \
+        $$PWD/network/qqtsockettcpserver.cpp
+    HEADERS += \
+        $$PWD/network/qqtsockettcpclient.h \
+        $$PWD/network/qqtsockettcpserver.h
+
     SOURCES += \
-        $$PWD/network/qqtudpprotocol.cpp \
         $$PWD/network/qqtsocketudpclient.cpp
     HEADERS += \
-        $$PWD/network/qqtudpprotocol.h \
         $$PWD/network/qqtsocketudpclient.h
 }
-
 #serialport
 SOURCES += \
     $$PWD/network/qqtserialport.cpp