A database-aided circuit design system and method therefor is provided, which can be utilized to detect problems of the product in an early design stage through the early design stage error-detection function, by making use of an artificial intelligence simulation database, storing the determination criterions for the optimized circuits, searching for failure generating factors and correcting the errors relative to the problems generated, based on the post production stage error-diagnosis function, in cooperation with the records stored in the artificial intelligence simulation database after the product has been actually produced, thus achieving the reduction of the product design and development costs, shortening the product market delivery time, and raising the competitiveness of the product.