An image forming device includes a communicator which performs communication with a user terminal apparatus, user account database (DB), a controller which creates a temporary account regarding the user terminal apparatus and registers the account on the user account DB, and an image former which performs the image forming job in response to a request for an image forming job received from the user terminal apparatus while the temporary account is valid, in which the controller records job performing results information on the temporary account in response to the image forming job being performed, and inactivate the temporary account when an inactivating condition is met.