A real-time infrared image displaying system based on Camera Link is designed for an infrared camera. The analog signal from an infrared detector is converted to the digital one in an analog to digital converter. As a control core, the FPGA is used to process the signal and transmit it remotely via optical fibers. Then, the FPGA at the receiving terminal is used to convert the signal to the Camera Link protocol data and transmit it to the image collection card of the computer for data collection and conversion. Finally, the image data is displayed via the software in the computer.