The third satellite of new generation polar orbit meteorological satellite of China(FY-3C)was successfully launched on September 2013. In order to analyze the capability of the microwave humidity and temperature sounder’s sounding channels in atmospheric parameters detection, the basic atmospheric parameters data of Katrina provided by the “University of Wisconsin-Non-hydrostatic Model System”(UW-NMS)were combined with the microwave radiative transfer model to simulate the radiometric characteristics of 118GHz and 183GHz. The results show that fine structure of atmosphere humidity and temperature profile can be achieved by using 118GHz and 183GHz which are the millimeter-submillimeter sounding channels. The brightness temperature of(118.75±5.0)GHz and(183.31±7.0)GHz decrease about 108K and 76K, respectively, due to the scattering of frozen hydrometeors. This result indicates that these channels data can be used to detect the cloudy atmosphere. The different kinds of hydrometeors can significantly affect the brightness temperature of 118GHz and 183GHz channels and it will be used in hydrometeors retrieval. When mixing ratios of rain drops increase, only the brightness temperature of(118.75±5.0)GHz decreases about 4.5K. The responsiveness reveals that 118GHz is an important band for precipitation retrieval. The brightness temperature of(118.75±5.0)GHz decreases about 10K when mixing radio of snow at middle layers increase. This result shows the channel can be used to detect the snow particle.