Exploring and applying the renewable energy and new type technology of saving energy have become the important issues that academe pays attention to. The use of complex technology of solar wall (SW) and phase change energy storage, can not only reduce the building energy consumption, but also improve the comfort of building environment. It has important value to study and explore for utilizing the energy sources continually. By establishing the SW and phase change floor (PCF) room that uses the solar energy as the heat sources, using patrolling instrument to test temperature and thermal flow, the electron micro demeanor to test air velocity and the portable test instrument of comfort etc to make the contrast experiments about the SW and PCF room to the ordinary room. Analyze the SW and PCF room’s thermal characteristic in the winter. Discuss the probability to improve the indoor thermal environment and reduce the building energy consumption using the SW and phase change energy storage technology. The study shows that under the same outdoor environment, the temperature of the SW and PCF room is higher than ordinary room about 1~2ºC,and the temperature fluctuation is lower, at the same time improving the indoor thermal comfort. The complex technology of SW and phase change energy storage offers the new way to reduce the building energy consumption.