This paper proposes a digital design method of quayside container crane based on expert systems and model base. It builds a design system of quayside container crane based on knowledge engineering. This paper discusses expert systems based on data base and calculation, and discusses structure of model base, standard parts, outsourcing parts selecting. It searches for the most suitable type and size driver model according to the basic design paramete, designs restriction and regulation. After calculation, it looks for type from expert systems, and then gains this type from model base for assembling, then generates design specifications and construction drawings automatically. This design solves the calculation and data sharing during problems during the quayside container crane design with CAD technology. And it realizes that calculation, structural design, process design, product data management integration.