The present invention is directed to, even when dividing an image arranged between a plurality of pages constituting facing pages before bookbinding printing, preventing different results of correction processing of images on the facing pages after bookbinding printing. An editing system lays out images on facing pages, divides an image laid out on facing pages to generate division images for respective single-side pages, and inserts the division images into the respective single-side pages to generate respective document data. Then, a printing control system extracts division images from the document data, combines the division images, performs correction processing on the combined image, divides the corrected combined image, inserts the division images into the respective document data to update it, and performs print processing based on the updated document data.