In the paper,the design and implementation of UDP-based FPGA remote upgrade system is designed,including a complete FPGA project and a complete set of host computer GUI program.When the FPGA is running,it is connected to the computer through the wired network,and the host computer GUI program is simply operated on the computer,which can realize the online upgrade and flashing,warm start and other functions of the FPGA.In fact,in the case of no network port and only serial port,this remote upgrade system can be switched to serial port mode through the mode selection switch,and the host computer GUI program is also switched to serial port mode accordingly,and FPGA remote upgrade and other functions are realized through the serial port.