The present invention relates to a real estate brokerage service providing method. The real estate brokerage service providing method according to an embodiment of the present invention includes : posting offer information input from a broker terminal; providing a consulting service via online chatting for a customer terminal sending a consult request through a messenger; storing the chat log of the consulting service via online chatting to a chat database; receiving a fraudulent real estate report from the customer terminal which checked the real estate according to the offer information; and processing the fraudulent real estate report for the offer information attached with the chat log according to the request from the customer terminal.(S100) Step of posting offer information input from a broker terminal(S200) Step of providing a consult chat service to a broker terminal and a customer terminal(S300) Step of storing the chat log to a chat database(S400) Step of receiving a fraud real estate report from the customer terminal(S450) Step of processing authentication by receiving a password from the customer terminal(S500) Step of transmitting the chat log to the customer terminal(S600) Step of making the fraud real estate report(S700) Step of evaluating reliability of the broker using the fraud real estate reportCOPYRIGHT KIPO 2015