According to one embodiment of the present invention, the method for operating a real estate sales transaction system comprises setting up a transaction system for real estate which is to be registered for sale in order to sell the real estate; setting the bid cost and number of bidders for the sale of the real estate according to the transaction system which was set up; receiving the bid cost for the real estate from a plurality of bidders, and receiving bid information related to the transaction of the real estate; according to the real estate transaction system, analyzing a first information group including at least one from among the bid information, the bid cost, and the number of bidders, and determining whether to conduct a transaction on the real estate; selecting a bidder according to the determined results from among the plurality of bidders when the transaction is conducted on the real estate; and processing the sale for the selected bidder and refunding a certain percentage to unsuccessful bidders.