Abstract: A server system connectable to a computer network and accessed by way of a user terminal for connecting to the computer network includes a user information database for storing user information, including personal information for a user and point information, and a point information database for storing point information specified for individual products and services; a serial number which is input and sent, using serial number input means, provided in the user terminal for inputting serial numbers assigned to individual products, services or the like, is received, and user authentication processing and serial number analysis processing are performed; the point information database is referenced, and the points corresponding to the corresponding product, service or the like are determined based on analysis of the serial number, and processing is performed to add the determined number of points to the point information in the user information database, to enable point shopping.