To recognize a purchase path of merchandise by a simple method, and to collect an advertisement fee on which an advertising effect is reflected.

An affiliate system is provided with: an advertisement server 12 for acquiring terminal identification information of terminal equipment 11 which has performed access to a WEB page on the basis of introduction information linked to a WEB page carrying merchandise information; a collection acting server 10 for acquiring the terminal identification information of the terminal equipment 11 when a merchandise purchase request is made from the terminal equipment 11, and for collecting the price of merchandise from a purchaser on behalf of a provider of the merchandise; and a tracking server 14 for storing the terminal identification information acquired by the advertisement server 12 and the terminal identification information acquired by the collection acting server 10, and for collating those terminal identification information. When both terminal identification information items are matched as the result of the collation, an advertisement fee is generated as result-oriented compensation. In the case of collecting the advertisement fee, the collection acting server 10 performs price settlement to the provider of merchandise by subtracting the advertisement fee from the price collected from the purchaser of merchandise.