An information processing system includes an image forming apparatus being an example of an information processing apparatus, and a user terminal. The image forming apparatus and the user terminal are directly and communicably connected by radio communication or the like. A remote operation screen for remotely operating the image forming apparatus is displayed on a display of the user terminal. On the remote operation screen, an additional function notifier is provided for notifying a user of existence of an additional function that is an operation function executable with an input device of the image forming apparatus to be operated, and is not executable with the remote operation screen in an initial state.