By using of the convention radiosonde data (standard pressure level and significant pressure level) of Beijing from the mid July to the 10th of August in 1996 and 1997,the air mixing ratio,drew moisture content vertical distribution profiles were calculated and the atmosphere was classified into four types according to the profiles. By integration of troposphere mixing ratio,the accumulated water content of troposphere (08:00 and 20:00) in Beijing was counted. It was found that the total water content of air columm was related to the precipitation. It provided the basis for precipitation area.Comparing this result to the remote sensing vapor and liquid water data obtained with microwave radiometer,it has been found that some valuable results can be used for other new sounding technique (e.g. GPS sensing of atmospheric water vapor for meteorology)