When image data sets are inserted in image data insertion areas in a template, the image data sets can be set preferably in the insertion areas with easy operation. A user connects a user terminal to a print order reception center via a network, and uploads the image data sets to be used. The user specifies reference points in the respective image data sets by using instruction input means. An order reception server displays composite images generated by matching the image data reference points with reference points predetermined in each of template data candidates at the time the template candidates are displayed.