In order to improve thermal insulation property of building envelope and make the most of solar energy, a photo-thermal Trombe wall system integrated with building was presented. Experimental wall and simulation model were established, thus heat transfer performance of the wall system was tested by experiment and analyzed by simulation. It is found that the thermal insulation property of Trombe wall performs well in winter. The measured maximum temperatures of the collector, the outside and the inside of the main layer are 91.3℃, 57.9℃ and 23.4℃, while the simulated figures are 88.4℃, 58.3℃ and 17.2℃ respectively. Influenced by solar radiation, there exist vertical temperature differences on every material layers of the wall system. The measured vertical temperature differences of the collector, the outside and the inside of the main layer are 17.9℃, 31.7℃ and 2.2℃, while the simulated figures are 17.2℃, 21.9℃ and 1.2℃ respectively. The vertical temperature difference of each material layer of the wall system increases with the increase of solar radiation and decreases with the increase of air interlayer thickness.