Parallel processing technology is one of the important indicators to measure a country’s comprehensive national strength, and the desktop super parallel computer - Linux PC cluster system because of its good scalability, low cost, high performance and can obtain free Linux, PVM and MPI parallel programming environment and other advantages, so as to be particularly suitable for China’s national conditions. According to the current development of parallel processing hardware and software resources, five options for building Linux PC cluster system are proposed: Ethernet, Fast Ethernet, Myrinet, ATM and Giganet.