This paper indroduces the design and realization of a signal transmitter based on FPGA. The sensor signal will be amplified at first, then output to the AD7264. After sampling and processing by FPGA, the data are transmitted by CAN interface or Ethernet interface, or converted into the standard current and voltage output by the AD5422. The article introduces the design and implementation of the system and particularly explains every functional modulethe of the hardware part, detailed schematic diagram and electric circuit's details.