In the existing meteorological operational system, the synchronization of the reception and sending of all kinds of meteorology data plays an important role in the meteorological operations and scientific research, and the clock synchronization of the whole meteorological network is even more urgent in need. The basic principle, the work model and the architecture of the Network Time Protocol (NTP) have been introduced in this paper, and a Guangxi Meteorological Operational clock synchronization network which is build in the LAN, operated under the Linux sever and acted as a lower level of the clock synchronization network of GuangZhou Regional Center has proved to be effective in practice.