The article simply describes the difficulties of the Mould and Die project control, and then put forward the thoughts of developing the Monitoring and Early Warning System for the Mould and Die manufacturing. Afterwards, the main three constructing principles and the goals of the system are explained carefully. Based on those, the theory and the classifications of the Monitoring and Early Warning are expounded. With the assistance of the use case diagram of UML (the United Modeling Language), the main functions of the system are analyzed; and with the activity diagram of the UML, the work flows of the monitoring and early warning are expressed clearly. Finally, the classes and the architectures of the system are designed by making use of the class diagram of UML.