A non-volatile memory is installed in an electronic device. A method for updating a firmware code stored in a non-volatile memory includes: providing an updating control unit having a command set; providing the updating control unit with a trigger signal to enable at least one command of the command set; and utilizing the updating control unit to read/write the non-volatile memory according to the enabled command to update the firmware code. Wherein each command of the command set is a memory read/write command. The method further includes updating at least one command of the command set in real time. The present invention further provides an electronic device corresponding to the method.