Abstract: The paper aims to test the application effect of LAPS system in low latitude mountain area. We compared the LAPS data in 2016 with the meteorological monitoring elements in Guizhou at the same time. The results showed that: the correlation coefficients between the LAPS values and the actual data in temperature, relative humidity and wind speed decreased gradually, but the RMS errors of wind speed, air temperature and relative humidity were in ascending order; the differences between the LAPS analysis value and the actual observed value were obviously correlated with the topography of Guizhou; the accuracy of temperature was high in the east and low in the west of Guizhou, and the LAPS analysis value was smaller when the wind was lower than 1.8 m/s, and was larger when the wind was higher than 1.8m/s, and the accuracy of u, v wind was lower; the accuracy of the relative humidity was high in the west and low in the east; the accuracy of visibility grade was 77.82%, and the higher the altitude, the lower the accuracy was. Therefore, the errors of air temperature, wind speed and visibility grade are small in low latitude mountain area with high practicability; the correlation between the visibility and relative humidity passes the reliability test, which can be used for reference; the availability of wind direction in low latitude mountain area is poor.