Abstract: A campaign system is composed of a campaign execution apparatus, POS systems, and portable telephones, all of which can use the Internet to communicate with one another. When there arises the campaign registration, the campaign execution apparatus in which member information including preference information has been accumulated extracts registered members that become to be targets of the campaign from the member information. The registered member receives campaign mail that fits his or her interest, and then he or she inputs identification information displayed as a bar code on the display of the portable telephone into the POS system. Then, a relier of the campaign can acquire private information that were not able to be acquired only with the POS system.