The system architecture of SMS (Supervisor Monitor Scheduler) is described，and the characteristics of GRAPES (Global and Regional Assimilation and Prediction System) numerical prediction are analyzed, and the conventional and the SMS based GRAPES operating technology and running processes are compared. This SMS base system builds a GRAPES numerical prediction automation system with the client/server architecture, divides the running process of GRAPES numerical prediction models reasonably, combines the similar functions of GRAPES modules, splits a complex single module into multiple tasks, simplifies the function of the individual tasks, and displays the processes of the models using the intuitive graphical interface in the implementation process by means of SMS technology. The system has achieved the automation of GRAPES numerical prediction operation, improved greatly the operating capability of GRAPES models, can ensure the reliability and timeliness of GRAPES models.