10. The method as claimed in claim 9 , wherein the search listing placement position is determined before the bidding prices are received from the network information providers.
9. A computer implemented method for generating a search result list in response to a search request input from a searcher through a communication network, comprising the steps of: maintaining a plurality of search listings including URLs associated with network information providers; determining a lowest limit bidding price for each keyword by a processor, the lowest limit bidding price being determined in consideration of at least one of a number of page views for each keyword, a basic unit price per one page view and a weight associated with a preference for the each keyword; receiving keywords associated with the search listings and bidding prices associated with the keywords from the network information providers, the bidding prices being higher than or equal to the lowest limit bidding price, wherein the received bidding prices are hidden from the network information providers; selecting a successful bidder among a plurality of network information providers associated with the keywords according to a predetermined criterion associated with the bidding prices after a tender period of time expires, wherein the tender period of time is a period of time in which the bidding prices are accepted; and generating a search result list including at least a portion of the plurality of search listings in response to the search request, wherein at least one portion of the plurality of search listings is arranged in a predetermined search listing placement position.