An electronic advertisement system including an advertiser-side computer for sending billing tag-attached electronic advertisement data describing a billing condition, a multitude of member-side terminal computers, and an advertisement agency-side administration computer connected via the Internet. Under the control by the advertisement agency-side administration computer, the billing tag-attached electronic advertisement data outputted from the advertiser-side computer is added with the corrected billing tag and the resultant data is sent to the respective member-side terminal computers. The member-side terminal computer determines whether the corrected billing condition of the received electronic advertisement data is achieved or not by analyzing the input data from the electronic device. The advertisement agency-side administration computer counts the corrected billing condition determination data from the member-side terminal computer and generates billing charge data to be processed by the advertiser-side computer.