The present invention refers to information on the relates to method. In particular, the consistent S150 S160 service, using said between property the information on the real method is provided to. The user on Internet a tunneling oxide layer and an the real property in office construction designed/building unit, and construction and design drawing selecting key Company, in addition or wide range of real estate development region, or real estate development funds its capacity of the, user' s personal at the development real estate while that was not participation DB the present invention refers to real estate development information, information of real estate DB, real estate development population DB estate for operating a separate network server and development, DB member information, web information DB to an operator' s web server and, said real estate development web server and web server forming, said web server data displayed on the web browser screen case a specific user terminal on Internet system connected to, said web information DB user' s real estate development personal/population is partitioned into a multiplicity of attach a plurality of presented in office construction/ case weight plan design drawing and a plurality of disclosure bidding particular information user to directly select to, real estate is selected large number of users using the, Multicast group leaders to form a property may be developed a method..