PURPOSE : A method and system for relaying real estate development information are provided to determine a target area for developing and a development type by the recommendation and participation of many development suggestion persons; to enable the development suggestion persons to optimally recommend, use, and deal a land; and to offer development information and services to landlords, development suggestion persons, and consumers on the basis of the location information of a real estate development supporting organization. CONSTITUTION : A map is provided on the screens of multiple user terminals (201, 202) connected to a system (100) for relaying real estate development information. A terminal used by a development suggestion person inputs a proper development target area and the use of development (S430). The proper development target area and areas with a high proposed number in the development use are selected as the area of interest (S430). A community for developing the area of interest is opened (S450). [Reference numerals] (100) Real estate development information relaying system; (201) First user terminal; (202) Second user terminal; (AA) Repeat; (S410) Access through a web server; (S420) Provide a map on a screen; (S430) Select a proper development target area and the use of development; (S440) Select an interest area; (S450) Open the community; (S460) Register the community and advertise; (S470, S530) Transmit an inquiry message; (S480) Select a real estate development support institution corresponding to the priority; (S490) Receive the inquiry message; (S495) Transmit an answer message and advertisement information; (S500) Receive the answer message within a constant period?; (S510) Receive the answer message and the advertisement information; (S520) Select a real estate development support institution corresponding to the following priority