In order to improve the quality of meteorological data and provide reliable data sources for weather forecasts and other meteorological applications,the paper presents a quality check method of meteorological observational data based on rule engine.The method is able to decode and translate accurately the routine meteorological message in real time.It can check and revise the message which does not meet the norms published by the WMO and the CMA.It also has flexible ability in man-machine interaction,by which to satisfy the developing and changing requirements about meteorological observational data.This method may replace the traditional quality control method,which use the meteorological extreme value examination.It can enhance the processing efficiency of real-time data,and can also promote the accuracy of result produced by meteorology applications.The practical applications prove that this method is effective and efficient.