To provide a computer system capable of reducing a burden and risk of customer information management for a company.

This customer information management system 100 is provided with game parlor computers 13 and 15 individually installed in game parlors and a management computer accessible via a communication network such as the Internet from the game parlor computers 13 and 15. The management computer 11 has a personal information database associating a member ID specifying each of registered members at each game parlor with personal information such as a name and an address of the registered member, and by access from the game parlor computer, searches the personal information database for personal information of the registered member. The game parlor computers 13 and 15 require perusal of the personal information of the registered member from the management computer based on the member ID.