A method for managing customer relationship management (CRM) data is provided. Log data including Internet address information associated with a user's terminal is received from the user's terminal via a communication network. User's CRM data is generated using the log data initially received from the user's terminal and is updated using the log data received from the user's terminal in which, the CRM data has been already generated. The generated and updated CRM data is transmitted to the user's terminal via the communication network such that the CRM data is stored in the user's terminal. An Internet user need not input CRM data whenever the Internet user uses Internet services and the user's own favorite information is obtained from a CP server which provides services suitable for each user using the CRM data without requiring a CRM solution having additional costs.