PURPOSE : A real estate transaction system and an operating method thereof are provided to acquire a high priced property at a low cost by selecting the high priced property matched with a location and a taste of a purchaser.CONSTITUTION : A transaction method of a property to be registered for sales is set for a real estate transaction(S12). The number of bidding people and bidding costs for the real estate transaction are set according to the transaction method(S14). The bidding costs are received from the bidding people and bidding information related to the transaction method is received(S17). A first information group is analyzed to determine the establishment of the real estate transaction according to the transaction method.[Reference numerals] (S11) Registering real estate; (S12) Setting a real estate transaction method; (S13) Drawing transaction method?; (S14) Setting bid costs and personnel; (S15) First auction method?; (S16_ 1) Setting a commission and personnel; (S16_ 2) Setting the commission; (S17) Receiving bid information; (S18) Transmitting a bid number; (S19) Bid period or the number exceeds?; (S20) End of a bid procedureCOPYRIGHT KIPO 2013