To provide a POS system with an advertisement distributing function for always advertising the latest information of an advertiser, and for reducing the load on a manger side.

Not a management headquarter prepares advertisements but an advertiser prepares advertisements(CM), and registers them in an advertisement registering terminal 30. Thus, it is possible for a manager to reduce advertisement preparing costs and labors. Also, it is possible to display the latest information of the advertiser. Whether or not the advertisements(CM) prepared by the advertiser are proper is transmitted to a headquarter terminal 20 so as to be confirmed. Thus, it is possible to prevent advertisements whose contents are not appropriate as advertisements from being distributed.