The present situation of crankshaft forging was described, and the necessity of crankshaft intelligent forging was presented based on the analysis of the development trend of intelligent manufacturing. Then, combining with the characteristics of crankshaft forging, the system structure of the layered intelligent forging was put forward, which consisted of four main modules: automatic forging production line of base layer, intelligent sensing and monitoring system of parameter extraction layer, MES system of manufacturing excurtion layer and expert system of decision layer. Meanwhile, the system architecture of crankshaft intelligent forging was constructed. In addition, the intelligent sensing and monitoring system of crankshaft intelligent forging were established, and the monitor and extract parameters on line were realized. Furthermore, a forging process of automatic operation, fault diagnosis and production management was built by the intelligent network architecture, intelligent sensing and monitoring system, MES and expert system.