PURPOSE : A real estate brokerage method and a real estate brokerage system thereof are provided to extend choices by providing diverse sale information through a broker.CONSTITUTION : A real estate transaction server (30) transmits transaction request information including the transaction request of a purchase request terminal (10) to a plurality of brokerage company terminals (40). The real estate transaction server transmits purchase information transmitted from the plurality of the brokerage company terminals to the purchase request terminal. The purchase request terminal transmits a purchase request for the transmitted purchase information to the real estate transaction server. The real estate transaction server transmits the purchase request information including the purchase request and the personal information of a buyer to a brokerage company terminal (40-1) which transmits the selected purchase information.[Reference numerals] (10) Purchase request terminal; (30) Real estate transaction server; (40) Plurality of brokerage company terminals; (40-1) First brokerage company terminal; (S1) Transaction request (request for checking real properties for sale); (S10) Transaction completion; (S11) Transaction completion notification; (S2) Transaction request information transmission; (S3) Transaction request information confirmation; (S4, S5) Real property information transmission; (S6) Determination whether a real property is fit for the transaction request; (S7) Real property transaction request transmission; (S8) Purchase requester information and real property transaction request transmission; (S9) Real property transactionCOPYRIGHT KIPO 2013