PURPOSE : A real estate brokerage system and method using an information use value about real estate trading information are provided to implement exclusive or public brokerage about real estate trading information by brokering the real estate trading information using the information use value of the real estate trading information on real estate brokerage system and server.CONSTITUTION : An information management unit (52) registers real estate trading information provided from an information provider and publishes first step sale information based on trading information online. If information use value about the sale information is presented from a plurality of information user terminals, an information relay unit (54) computes the temporary amount of a first step sale information use value about the sale information according to a first regulation and computes a person satisfying a predefined second regulation among a plurality of information users as an exclusive brokerage agency. A payment unit (58) computes the final amount of the first step sale information use value and computes the actual brokerage commissions of the exclusive brokerage agency to charge information brokerage commissions to the information provider or the exclusive brokerage agency after the contract about the real estate of the sale information is concluded by the exclusive brokerage agency.[Reference numerals] (52) Information management unit; (54) Information relay unit; (56) Contract processing unit; (58) Payment unit; (61) Trading information DB; (62) Market information DB; (63) Information DB about houses for sale or rent; (64) Real house information DB; (65) Contract information DB; (66) Member information DB; (70) Messenger (email) serverCOPYRIGHT KIPO 2013