PURPOSE : A real estate transaction method is provided to offer the information about a real estate seller and a real estate purchaser registered in a server computer to a real estate agent around an article for the sale in the real time and to promptly connect a real user with the real estate agent by offering the contact information about the seller and the purchaser.CONSTITUTION : The conditions about a real estate to sell via a communication network are registered. The information about the business of the real estate agent(30) is registered. The information about the registered real estate for the sale is provided to the real estate agent(30) by a short message service. If the real estate agent(30) desires to use the information about the seller(10), an information use fee is paid by the real estate agent(30). After the information use fee is paid, the contact information about the seller(10) is provided to the real estate agent(30).? KIPO 2003