Abstract:with the development of computer technology, the embedded systems are widely used, especially the application of embedded technology in the field of network protocol has become a development trend. The hardware platform is based on S3C44B0X microprocessor and RTL8019AS chip, the design and implementation of a real time operating system based on TCP/IP protocol stack, and move it to the embedded system. In this paper, the hardware platform of system design is presented, discusses the implementation method of embedded TCP/IP protocol stack based on real time. Finally has carried on the system test, and the results are analyzed, the analysis results show that the system has the advantages of low cost, easy to use etc..