MES system is a set of production information management system for the workshop executive layer of manufacturing enterprises. MES can provide enterprises with management modules including manufacturing data management, planning and scheduling management, production scheduling management, inventory management, quality management, human resource management, work center/equipment management, fixture management, procurement management, cost management, project kanban management, production process control, bottom data integration analysis, and upper data integration and decomposition, so as to build a solid, reliable, comprehensive and feasible manufacturing collaborative management platform for enterprises. Traditional MES can be roughly divided into two categories: 1) dedicated MES. It is mainly developed for problems in specific fields, such as workshop maintenance, production monitoring, limited capacity scheduling or SCADA. 2) Integrated manufacturing execution system. At first, this system was designed for a specific standardized environment, but now it has been extended to many fields, such as aviation, assembly, semiconductors, food and health. It is functionally integrated with upper transaction processing and lower real-time control system.