[Problem] to drastically reduce the labor of real estate property information display system for real estate area. [Solution] The site ID is given real estate property for mediating the area real estate information are displayed. Meanwhile, the display device is connected through a real estate server site [...], control, communication and storage is provided, the area of the intermediary object ID is inputted from the real estate agent computer used by a management server, the management server shoot the same content property information display real estate information site acquisition, it is displayed on the display part. Figure 1 [drawing]