Abstract: According to the traditional fire KANG characteristics, a solar heating system named solar KANG was proposed and a theoretical study of solar KANG system was presented. Experiments of the solar KANG system were conducted and experimental tests were performed. The theoretical results are in good agreement with the experiment results. Based on the validated model and real time meteorological data of Hefei, thermal comfort in sleeping environments and indoor thermal environments were studied when the solar KANG system was in operation in winter. Results show that indoor air temperature varies between 8 ℃ to 15 ℃ when outdoor temperature is about 0 ℃ and KANG surface temperature is no more than 35 ℃. After stopping heating at 21 oclock at night, sleeping environments can be kept at the comfortable range of 28.5 ℃ to 34 ℃ with thermal energy stored in KANG releasing gradually. Solar contribution rate is about 345%.