The environment of management is changed by the improving Information Technology, the changing market that is overflowed by product, the competing between enterprises, and the segmenting the whole market. As a result, the concept of the 1:1 marketing is appeared on the environment of management by high quality that customer needs. In this paradigm, the CRM(Customer Relationship Management) is able to be executed by the advancing of the Information Technology (IT), the constituting, Data Base, the analyzing data in Data Base. The CRM(Customer Relationship Management) offers integrated multiple view poingts and methods of the corresponding to customers. The CRM(Customer Relationship Management) is a crirical element in the business. This study considers the effective implementing CRM(Customer Relationship Management) in the steel industry which has unique characteristics