Abstract:A vessel monitoring and simulated system is designed based on Siemens S7-300, which realized the PLC program. The data communication function is implemented based on Prodave software package and Profibus. The navigation information, the run information of the device and so on is collected into the upper-computer instantly. On the basis of integrated information platform network and database, the vessel monitoring system based on PLC module is developed recur to the virtual reality technology, computer modeling technology, fault diagnosis technology, united information technology, network information technology and so on. The proposed system can reduce the labor intensity of the vessel worker and improve their working efficiency effectively. Meanwhile, with the help of the proposed system, the vessel worker can do basic skill training, vessel manage training, diagnose training, and so on.