In this study, by using the natural language processing of the field of artificial intelligence, automated index was performed. And then, the Natural Language Processor for Constructing Database (NALPDB) has been developed. Furthermore, the Design knowledge Information RElational DataBase (DIREDB) has been also developed, which is designed to interlock the knowledge base. DIREDB processes both the documented design-data, like a concrete standard specification, and the design knowledge from an expert. DIREDB is also simulates the design space of structures accordance with the production rule, and thus it is determined that DIREDB can be used as a engine to retrieve new knowledge and to implement knowledge base that is necessary to the development of automatic design system.