To provide a system and a device for image formation with which a booklet can be bound with a front or a back cover.

An image formation system includes; an image formation device 3 including a paper feed tray, a printing unit that performs printing on a paper sheet sent from the tray and a control unit that performs control to feed a post-processing device with printed paper sheets as a booklet body to be bound; and the post-processing device that binds the printed paper sheets, provided by the image formation device 3, with rings to make a booklet. The control unit performs control to feed the ring-binding unit of the post-processing device with a front inside cover, a back inside cover and paper sheets for outside covers as well as the booklet body, in the order of a back inside cover, paper sheets for outside covers, a front inside cover and a booklet body.