The fundamental and method of the ground-based microwave radiometer remote sensing retrieval of integrated water vapor(V) and cloud liquid water(L) in the atmosphere are introduced herein.Climatologically representative retrieval equations for different seasons in Beijing are given,and the numerical simulation tests of the accuracy of retrieval results are also presented.The relative standard deviation of retrieved values of V is 3.1%,1.6%,2.2% and 2.4%,respectively,for spring,summer,autumn and winter.It is found from the retrieval results of the NASA microwave radiometer data taken at Xianghe that on average,the retrieved V is 0.21cm greater than that measured by radiosonde;the linear correlation coefficient between the two V is 0.988,and the rms error is 0.16cm;and the L value is always below 0.1mm except precipitation weather.