PROBLEM TO BE SOLVED : To provide a real estate mediating system capable of simplifying a mediating task at the time of real estate buying and selling and real estate lease, and reducing costs, and contributing to the free fixing of a mediation commission.SOLUTION : This real estate mediating system is provided with terminal equipment 20a and 20b and portable terminal equipment 20c for executing the procedure of the registration of buying and selling real estate or application for the purchase of the real estate, a buying server 10 for executing buying processing by accepting the registration of the buying and selling real estate, a purchasing server 40 for executing purchase processing by accepting the registration of the purchase of the buying and selling real estate, and an Internet 30 for connecting each terminal equipment 20a-20c, the buying server 10, and the purchasing server 40.