Realty information sharing system is provided to of the present invention, step local and each customers membership real estate related judged whether or not a received channel the method as well as personal information, to whether there is other advertisement file linked same, said shared information of real estate improving use' s convenience and shortening over the system to people who have information, may publish real estates information sharing system for intermediating real estate over relates to business method. I.e., through the online, the present invention refers to such as said member said local information is received real estate, transaction judged whether or not a received channel, offerings according to the type classification the database with the server (120) real estate information registration and storing; said data database server (120) scrolls the whole member information is read from address stored in the storing said real estate information registration step short information of information registered at the registering information sending e-mail routed to a and; said member said request is received for registration information for judging whether said digital signal can be an request downloaded transmitting information file and file transmitting information of real estate; said member downloaded information file saved data is stored in a personal terminal, external display device (300) is connected to a general for those consumers has been disclosed disclosure information publisher disclosure includes.