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Measurement comparison is organized by the Ningxia Meteorological Metrology Calibration Laboratory to verify the calibration capability of the Northwest China meteorological metrological institutes. Temperature, humidity, and pressure are involved, and automatic weather station sensors are used in the experiments. The leading laboratory is in charge of data collection and analysis. The comparison result analysis is carried out by means of normalized standard deviation. The comparison results of temperature and pressure are very satisfactory, and that of humidity is satisfactory. The comparison test data is realistic and credible. The results can reflect the level of verification or calibration, and the current situation of meteorological measurement standard devices of reference laboratories objectively. It can also identify the problems existed in the reference laboratories effectively, which is very important in improving the capability of calibration laboratories.