Abstract: A method for remotely updating firmware of a field programmable gate array (FPGA) includes: by a controller, transmitting a storing instruction and relaying an entry of configuration data received from a remote device to a processor of the FPGA; by the processor, performing an updating subtask to store a file segment recorded in the entry of configuration data in an update-storage area indicated by location information recorded in the entry of configuration data; by the controller, determining whether the processor has successfully completed the updating subtask, and when affirmative, enabling the remote device to transmit another entry of configuration data; and repeating the aforementioned steps.