A system comprising a database where stored are housing space display data containing information on the geography of a housing space such as a real estate object, interior display data containing information on the interior of a housing space, and furniture display data containing information on the shape of each piece of the furniture provided in a housing space. A browser adapted for displaying the interior of a housing space as a virtual space on a terminal of a potential purchaser according to the base and having an operation menu for operating the position of the viewpoint in the housing space is provided to the terminal, and the data is provided to the terminal through the Internet.