This study has presented a proper model of expert system for the very thin sheet metal press die design. Using the suggested model, an expert system of the very thin sheet metal press process has been developed. The system developed for three kinds of specimens are applicable to the practical field and its applicability has been discussed. The system is based on the knowledge expert`s empirical technologies in the practical field. Using C-language in the HP-UNIX system, CIS customer language of the EXCESS CAD/CAM is used as the overall CAD environment. The results obtained from this system will provide effective guide-­Lines to the designer in this field.