A firmware updating method for updating firmware for an information processing apparatus that includes setting a communications device as a boot device according to an instruction from a remote management server, resetting the information processing apparatus in system reset according to a system reset instruction from the remote management server under an environment of an operating system of the information processing system operating, booting the information processing apparatus by the communications device thereby to update the firmware stored in the storage via the network, setting the storage as a boot device thereby to control off a power supply of the information processing apparatus in response to a request from the remote management server, controlling on the power supply in response to another request from the remote management server, and reading and executing the firmware updated in the storage of the information processing apparatus.