PROBLEM TO BE SOLVED : To provide a real estate selling and buying brokerage method, etc., which can properly be applied to brokerage of selling and buying real estate by properly connecting a seller and a buyer of real estate to each other.SOLUTION : This real estate selling and buying brokerage method is used for brokerage of selling and buying real estate by using a system constituted so that a server device 1 and client devices 2 can communicate with each other through the Internet 3, and has a step where specific information regarding an agent for real estate dealing is registered, a step where specific information regarding an application for real estate dealing from a seller or buyer of real estate is registered, and a step where the registered agent is introduced to the seller or buyer having applied for the real estate dealing.