In many fields such as communication,aviation,aerospace and medical treatment,FPGA as the main controller is irreplaceable.The traditional update method of FPGA based on JTAG (Joint Test Action Group) has the problems of relying on special JTAG download cable and local development environment,poor loading stability and low transmission rate.This paper presents a technical scheme for remote update of FPGA based on Stratix series.This scheme ensures that the basic hardware circuit is the same as the traditional update method.The FPGA software can be updated through software function expansion,which makes the debugging,updating and maintenance of products more convenient.The engineering practice has proved that the updating efficiency is increased by about 10 times by using the remote updating method,and the technical scheme is stable and reliable.