According to one technological aspect of the present invention, a real estate brokerage system comprises : a real estate brokerage management server which manages information of real estate for sale and approves access, update, or generation of a broker based on a grade of the broker with respect to the information of real estate for sale; and a card company server which manages card customer information, receives the information of real estate for sale from the real estate brokerage management server, and provides the information of real estate for sale to card customers or advertises exclusive brokerage rights of the real estate brokerage management server. The real estate brokerage management server can pay for a real estate brokerage fee by firstly using card customer′ s card points in cooperation with the card company server when the card customer completes a real estate transaction, and pay a broker associated with the real estate transaction, a broker expense calculated by deducting a predetermined commission from the real estate brokerage fee.(110) Real estate brokerage management server(120) Card company terminal(130) Real estate broker terminal(140) Client terminal(AA) NetworkCOPYRIGHT KIPO 2017