An electronic real estate transaction is performed. An electronic real estate transaction is configured to verify identities of transaction parties through authentication of a terminal of a seller, a terminal of a purchaser, and a terminal of a licensed real estate agent and to determine whether the agent in question is a legitimate licensed real estate agent through authentication of the seller and biometric information of the seller, thereby preventing dispute attributable to denial of the transaction of the seller or the purchaser in the future, and also improving reliability between the transaction parties. An authentication procedure for a licensed real estate agent is enhanced, and a fixed date is generated upon real estate transaction, thereby protecting a lessee of a lease transaction. A report on a real transaction cost, tax calculation, a notification of a calculated tax amount, a report on moving-in management, registration of cancellation of a right to collateral security, registration of ownership transfer, and registration of setup of a leasehold right are automatically performed, thereby preventing additional taxation and also preventing dispute between transaction parties or between a transaction party and a third party. An electronic real estate transaction is performed via an electronic document, thereby reducing costs required for use and storage of papers.(10) Personal information management server(100) Real estate electronic transaction system(12) Mobile communication server(14) Identification server(16) Rental transaction information system(18) Real transaction cost report system(20) Official authentication institution server(200) Seller terminal(22) Moving-in management server(24) Electronic revenue stamp issuance server(26) Certified electronic document center(28) Legal agent server and terminal(30) Public information sharing center(300) Licensed real estate agent terminal(32) Online supreme court registry office(34) Financial institution server(36) Korea land information system(400) Purchaser terminalCOPYRIGHT KIPO 2017