The high resolution numerical weather prediction system in Central China, named WuHan Mesoscale Model (WHMM), is designed and operated since 1 April 2014 This operational system was submitted and ran by the command lines. There are still some shortcomings in WHMM, such as, monitoring and managing the system not intuitively enough, finding and processing obstacles not conveniently, and having low operational efficiency. Therefore, the new WHMM with the client/server architecture is designed based on the Supervisor Monitor Scheduler (SMS). The new operational system fully considers the relationship between processes and the integrating all processes as a whole. Compared with the original system, it has the following characteristics: providing a clear and friend graphical interface and monitoring conveniently； locating and solving the obstacles easily and quickly. Additionally， it could improve greatly the operational efficiency, and the overall running time decreased about 354%, which is mainly concentrated in the downloading data, postprocessing, and making products.