Image data sets are filed efficiently in an image storing server. An image generation apparatus reads images from a film, and image data sets representing the images are sent to and registered with the image storing server. The image data sets are stored in a folder generated for each user. The user accesses the image storing server from a communication terminal and carries out filing on the image data sets in the folder, such as sorting according to the date and time of photography. In this manner, the image data sets can be stored in the image storing server in a well-organized manner.