The printing process system for laying out and printing images for two pages on one side of each sheet for creating a booklet, comprises: a generating unit for generating, in order to cause a plurality of printing devices to print the images on the sheets to form a booklet, print sheet data and insertion sheet data intended for each of the printing devices; a calculating unit for calculating a shift amount of the image for each of the sheets referenced in the print sheet data based on the print sheet data and the insertion sheet data, the shift amount ensuring that the image gets closer to the center of the sheet as the sheet gets closer to the innermost of the booklet; and an instructing unit for instructing a relevant printing device to print the images on the sheets referenced in the print sheet data, based on the shift amount.