1. A distributed search system connecting a plurality of computers on a network, each of the plurality of computers comprising: means for storing advertisement information including position information of an information resource; means for searching the storing means of each of the plurality of computers in response to a search request; means for accepting a request to register advertisement information in said storing means; and means for transferring the advertisement information requested to be registered to the plurality of computers, wherein transferring of the advertisement information is determined by cost information given to the advertisement information.