Image output system including a server and multi-functional peripherals

An image output system comprising a server and a plurality of multi-functional peripherals connected to the server through a network and capable of outputting an image, wherein

• the multi-functional peripheral has a wireless communication portion which communicates with a mobile terminal apparatus wirelessly and an authentication processing portion which requests user authentication to the server based on user information including at least user identification information input from the mobile terminal apparatus or an operation portion provided in the multi-functional peripheral,
• the server has a user authentication portion which performs user authentication in response to a request from the multi-functional peripheral and an interface instruction portion which specifies a user interface image displayed on a display portion of the mobile terminal apparatus for operating the multi-functional peripheral depending on the user identification information, and instructs the multi-functional peripheral to display the user interface image on the mobile terminal apparatus when the user authentication is succeeded,
• the multi-functional peripheral executes image output in accordance with a user operation received from the mobile terminal apparatus through the wireless communication portion in a state where the user interface image is displayed on the mobile terminal apparatus,
• the server has a content registration portion which receives registration processing of a content subjected to image output, which is performed through the network and by specifying the user identification information from the mobile terminal apparatus or an information processing apparatus different from the mobile terminal apparatus, and stores the content in relation to the user identification information, and
• the multi-functional peripheral acquires the content from the server and executes image output for the acquired content.