This paper shows a framework that design process information is explicitly described and is implemented in the shipbuilding CIM system developing by authors. The two concepts are proposed as an elementary factor of design model in this framework. One concept is “Information of entity” and another one is “Information of attribute”. And design information processing is characterized as a progress from a rough design to detail design, so two design flows are proposed : one is “specification for model structure” and another is “specification for model status”. The specification for model structure means a structure of product model described by information models of entity and attribute. And a specification for model status means definitely description of information of relation and attribute values in the defined model and management that information. In the prototype system, the information processing functions driving the specification for model structure and the specification for model status are defined as system component, and a designer proceeds design activities using the components combining. As a result the process are described in components network and well managed.