A subject user is photographed in a photographing system in a theme park. At this time, photographs are taken a plurality of times at a predetermined time interval. Further, an instruction is given to photograph a specified number of times according to a number of persons included in an image which will be photographed. It is judged whether or not persons included in a plurality of image data obtained by photographing have their eyes open. A single set of image data which is judged to include the persons with open eyes is sent to an image storage server and stored in the image storage server.