PURPOSE : An integrated customer management system for real estate target marketing is provided to collect and manage customers and to promote information to customers who needs the information.CONSTITUTION : Information about customers(101) collected through the Internet(102) is stored in a customer information database(106). When a customer calls a consultant to satisfy curiosity, the telephone number of the customer is automatically stored through a CID(Caller' ' s Identification) machine in the customer information database. When a customer visits the consultant, information acquired through consultation is stored in the customer information database. Information about customers joining various events is collected and is collectively stored in the customer information database.COPYRIGHT KIPO 2011