PROBLEM TO BE SOLVED : To further surely acquire a prospective customer using a map and a blog-posted article. SOLUTION : When a Web server processing part 110 receives a map request from a client, a map processing part 123 generates and returns a map document for receiving a transmission instruction of property information in a position of the map corresponding to a real estate property position. When the Web server processing part 110 receives the client' s request according to the instruction, a work support part 122 reads URL of a property information-intermediate agent page from a data storage part 100, and generates and returns a property information display document with a link to the URL being embedded. When the Web server processing part 110 receives blog article data related to a real estate property, an application part 120 reads URL from the data storage part 100, sets a link to the URL to the article data, and stores it in the data storage part 100. COPYRIGHT : (C)2008, JPO&INPIT