A user ID and a corporation ID for identifying an organization to which the user belongs are registered while being associated with each other previously and the corporation ID of an organization to which the user belongs is specified based on a login name being inputted when the user logs in a shopping site from a terminal S1. Based on the specified corporation ID, user ID of a user associated with the same corporation ID is specified S2. Based on the specified user ID, order information corresponding to the user is retrieved S3 and the order status, for a specified interval, of an organization to which the user belongs is displayed on the terminal S4.
