To provide an advertisement providing system which can know in advance the advertisement effects to portable terminals and appropriately set the charge for medication in advertisement provision.

This advertisement providing system provides corresponding information as a portable terminal 1 accesses an information providing site and also stores the location of the portable terminal and the provision time as a log in a log database 3 by a server 5, computes and presents the charge for mediation in advertisement provision, corresponding to the actual result of the frequency of access by advertisement frames defined by areas and time zones, by analyzing the log, and receives reservations for advertisement data provision by the advertisement frames to make settlements by the advertisement frames.