Patent ID: 8539267

Claim:
A power management method of an image forming apparatus which communicates with at least one terminal device supporting a universal plug and play (UPnP) protocol, the method comprising: setting power save mode information which comprises a plurality of levels corresponding to the UPnP protocol to the image forming apparatus; storing the set power save mode information; receiving a command to enter a first power save mode among the plurality of levels from the terminal device; comparing the received command to enter the first power save mode with the stored power save mode information; and entering a power save mode by the image forming apparatus corresponding to the received command to enter the first power save mode, wherein each of the plurality of levels of the power save mode is set to selectively cut off power to a plurality of elements of the image forming apparatus instantaneously and without a standby time according to at least one of an operation at a time of entering a power save mode, an operation at a time of requesting a job and an operation after a completion of the job.