A precise micro-displacement measurement system based on network communication is introduced. Network communication, FGPA and the linear CCD are adopted in the system. The linear CCD generates 5 000 line data per second. The FPGA processes the data synchronously. The network communication is applied to implement long-distance data transmission and multi-station communication. The hardware system is controlled by the PC control program, which is developed by VB6.0. The whole system demonstrates high reliability, and it is applied in the one-dimensional micro-displacement measurement system with a precision of 100 μm.