The apparatus includes: a conveyance directional processing part for performing processing along the conveyance direction onto the sheet, the conveyance directional processing part being constructed such that at the same position in the conveyance direction, a plurality of processing machines of two or more types are aligned in a width direction perpendicular to the conveyance direction and provided in a freely attachable and detachable manner; a condition input part through which processing conditions in the conveyance directional processing part are inputted; a display part for displaying the processing conditions; and a processing machine selection control part for acquiring types and arrangement of the processing machines to be provided in the conveyance directional processing part such that the processing conditions may be satisfied and then displaying the acquired types and arrangement on the display part.