PURPOSE : A method for a one stop service of a real estate related business is provided to execute all real estate related services for a user.CONSTITUTION : A seller registers an article for sale to a real estate business agency through a telephone or the Internet(S101, S102). A buyer connects to the real estate business agency through a telephone or the Internet and requests a purchase(S103). The buyer inputs detailed information with respect to the real estate to be purchased(S104). The real estate business agency searches an article similar to a sale condition of the seller and a purchase condition of the buyer(S105-S107). The searched information is transmitted to the buyer. If the buyer wants to purchase the searched article, the sale condition and the purchase condition are compromised(S108-S113). If a trade is concluded, a trade contract is processed(S114, S115). The buyer requests a loan through a financial institution(S116, S117). Various documents for a registration are received from the seller and the buyer, the registration is executed. If the registration is completed, commission is received(S118-S120). The user joins to a real estate related insurance and a commission is received(S121). If the transaction is completed, all related documents are transmitted to the seller and the buyer(S122).? KIPO 2003