A quality verification of the day to day radiosonde data of seven stations from May 2002 to April 2003 was conducted and a characteristics analysis was made of temperature and water vapor profiles from radiosonde data in January, April, July and October. Theses profiles were compared with 43 profiles used frequently worldwide in radiative transfer calculation. The results show that atmospheric profiles in China have obvious temporal and spatial distribution characteristics and have little relation with altitude. It is not enough to use the universal 43 profiles in the forward and retrieval calculations in China, so samples from China should be added.