In a contents distributing system, a monitoring server is equipped on a network with which all user terminals being capable of utilizing contents are allowed to connect, and a member card is issued to a user operating the user terminal. In the contents distributed from an information service server, a middleware for storing a history of utilizing contents (log data etc.) to the member card and for transmitting this history of utilizing contents along with a user ID to the monitoring server is embedded. The monitoring server generates utilization information indicating how much the particular contents are utilized by the user, based on the collected history of utilizing contents and the collected user ID.