Abstract: Use of wanzhou national basic automatic weather station in 2019 and artificial observations, and sunshine time using the method of difference and correlation coefficient test, respectively from the aspects of one hour, day by day, month by month, sunshine time evaluation automatic observation (photoelectric digital sunshine recorder) and artificial observation (dark tube sunshine meter) two observation methods to obtain data sequence differences, and analyses the causes of differences. The results showed that the number of hours of sunshine under automatic observation was generally larger than that under manual observation, and there was a significant correlation between the number of hours of sunshine under automatic observation and the number of hours of sunshine per hour, day and month, which met the requirement of consistency of data obtained by replacing manual observation with automatic observation.