PROBLEM TO BE SOLVED : To provide a customer information management system capable of quickly acquiring customer information in accordance with the target of a business activity and effectively supporting the business activity.SOLUTION : In this customer information management system for managing customer information used for the business activity of real estate, a terminal system 10 is installed in each service office, a center system 20 is installed at a specified place and they are connected through a network 30. Customer information is stored in databases 11 and 21, and map information is stored in a database 22. A terminal device 12 retrieves each of the databases 11 to 22 on the basis of a preset condition and symbolizes and displays the customer information on a map. Thus, the contents of the customer information are visually and immediately grasped.