讨论了利用网络芯片RTL8019AS将基于51系列的单片机W78E58B接入Internet的实现方法。本文设计的这种嵌入TCP/IP协议的单片机系统板，具有成本低、占用面积少、使用方便等优点。可为家电上网、以及其他嵌入式应用系统的远程网络控制，提供一种新的良好的解决方案。关键词: 信息家电；嵌入式TCP/IP；RTL8019AS；单片机Abstract： This article discusses the way of connecting the embedded system basedon micro controller 51 with the Internet by RTL8019AS.this micro controller systemsembedded TCP/IP protocol is protocol in the paper has many advantages, such as lowercost, smaller area of hardware, and easier to use. Can for the home electricity internetaccess, and the other embedded applies the long range control provide a kind of new goodsolution.Key words: Information Appliance； Embedded TCP/IP Protocol； RTL8019AS； MCU