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In this paper, the key technologies of web server based on embedded light-weight TCP/IP Protocol uIP and high-performance processor STM32 are mainly introduced. This system provides a transparent channel for massive and high-speed data transmission in controlling the mainstream RS-232 device and data acquisition system. For the need of overcoming the contraction of the high-time sequence and none-interruption of uIP and the massive data transmission, this system introduces simple ring buffer with DMA technology. And the test show that the performance of the web server system is improved and the bit error rate is reduced.