PROBLEM TO BE SOLVED : To provide property information necessary for a user and to have the analysis of peripheral environment of the property information, etc., possible to be carried out mainly by the user.SOLUTION : This property information managing device 3 is provided with a real estate property information database 32a to store real estate property information sent from a terminal 1 on the provider side via the Internet N, a geographical information database 33c to store geographical information, including map data of principal cities; a GIS server 33 to perform commercial area analysis and area statistical analysis regarding an optional property or an optional location, based on the geographical information stored in the geographical information database 33c, when an investigation request signal of the optional property or the optional location is transmitted from a terminal 2 on the user side; and a Web server 31 as a means of transmitting an analysis result by the GIS server 33 to the terminal 1 on the user side, together with the map data, including the applicable property or location stored in the geographical information database 33c.