For generating photo albums on events such as weddings, the photo albums can always be generated in the same quality. A professional photographer photographs the bride and groom on a wedding. Images are read from a developed film and stored in a file server. A template used for generating a photo album is added with composition information representing composition of images to be inserted in image insertion areas therein. When an operator selects one of the images to be inserted in any one of the image insertion areas with reference to an editing screen having a catalog display field and a template display field, processing information representing a magnification ratio and/or a trimming position is generated based on the composition information so that the selected image has the composition appropriate for the image insertion area. The selected image is processed according to the processing information.