Aiming at the heating problem of hot-summer and cold-winter areas，the experiment system of air source heat pump and capillary floor radiant heating was established. The characteristics of indoor temperature，the walls temperature and indoor thermal environment were tested and analyzed under different water supply temperatures of 40 ℃，37 ℃，35 ℃，33 ℃，30 ℃. Under the condition that the cover area of capillary radiation over the ground is 50%，spacing of capillary is 20 mm，the filled pomegranate concrete thickness is 50 mm，the surface covered with the wooden floor thickness is 12 mm in Chongqing，the experiment results show that the indoor temperature is stable at 18.73 ℃，18.06 ℃，17.03 ℃，16.09 ℃，and 15.28 ℃，the indoor thermal sensation (PMV) is -0.65，-0.82，-1.09，-1.31，and -1.44，and the percentages of dissatisfaction (PPD) is 14%，19.08%，30.18%，40.71%，and 47.39%，respectively. The maximum temperature difference in the vertical and in the horizontal is 0.39 ℃ and 1.12 ℃ in the rooms with different conditions. When the water temperature is equal or greater than 33 ℃，it satisfies the requirements of indoor temperature ，and when the water temperature is equal or greater than 37 ℃，the indoor PMV and PPD meet the evaluation of thermal comfort standards. In addition，the distribution of indoor temperature is uniform under different conditions.