Image forming apparatus, driving method thereof, and computer-readable recording medium

Disclosed is an image forming apparatus. The present image forming apparatus includes a communication interface module making communication with an external device; a control module for performing an authentication process for an external device in the state that a power saving mode is maintained if the operation mode of the image forming apparatus is the power saving mode, and if a job performing command is received from the external device; and a function module for switching the operation mode of the image forming apparatus depending on the result of the authentication process and for performing a function corresponding to the job performing command. [Reference numerals] (110) Communication interface module; (120) Function module; (200) Control module