This paper was aimed at analyzing and verifying each of the parameter settings in the computing process of GAMIT.The optimum number of introduced auxiliary station was determined, and models for the weighted mean temperature of the atmosphere in Guilin were established.Under the underlying strategy of introducing all the respective most optimum criteria, the precipitable water vapor (PWV) was first calculated by using the data provided by beer button down shirts for men the CORS base station mpu63zm/a in Guilin, before analyzing and comparing it with the PWV and actual precipitation obtained from the sounding data.According to the result, a high degree of coincidence was discovered among the general trend of the following three indicators: the calculated PWV, as well as the PWV and actual precipitation acquired using the sounding data, hence offering a significant value for reference in terms of extreme weather warning.