The time synchronization is demanded in the meteorologic operation. In particular, the accurate simultaneous observation of a variety of meteorological data are very important in the research and applications. With the methods of observation and observation equipment increasing, the demand of the whole network time synchronization is also more urgent. The principle, working models and architecture of time synchronization protocol were introduced, and then the timesynchronization was designed and used in Guangdong meteorological business, and achieved very good results.