Abstract: Selecting weather phenomenon and minute precipitation data of both automatic and artificial observation in parallel of 10 stations, such as Wenjiang and Mount Emei, from January 2018 to October 2018 and taking the artificial observation values as reference, according to the number of different precipitation processes and the number of minutes of precipitation, this paper evaluates and analyzes indexes of accuracy of artificial and automatic observation such as capture rate, missing rate, failure rate, error rate, matching rate and absolute error of starting and ending time. The results show that the capture rate of precipitation phenomena observed automatically at night is obviously higher than that during the day, and the capture rate of precipitation is higher than that of snow and sleet. The capture rate of heavy precipitation is higher than that of weak precipitation. The error and missing rates of solid precipitation are higher than that of liquid precipitation and mixed precipitation. Without precipitation phenomenon, the failure rate of precipitation and drizzle is about from 1.99% to 2.18%. The matching rate of precipitation is better than that of snow and sleet. There is a significant difference of the starting and ending time between automatic and artificial observation, and the proportion of absolute error ΔT > 15 min is higher than that of ΔT ≤ 15 min, and the proportion of ΔT ≤ 15 min also increases with the increase of precipitation.