A multifunctional image forming apparatus includes: a communication device communicable with a server providing a service related to image formation with the user; a display operation device having a display function, for receiving a user operation; and an image forming unit for forming an image in response to a user instruction received through the display operation device. The multifunctional image forming apparatus receives an input operation by the user through the display operation device, displays a screen in accordance with the input operation and, in addition, executes a user registration process for the service provided by the server through communication with the server through the communication device, and displays a screen thereof.