The temperature distribution of building exterior wall is obviously affected by solar radiation, and its influence degree is closely related to season and orientation. In summer, the peak temperature of the west wall is the highest, and the temperature fluctuation is large; in winter, the surface temperature of the south wall is highest, and the temperature fluctuation is large; in all seasons, the average temperature of the north wall is low, and the temperature fluctuation is small; the wall temperature in spring and autumn is between winter and summer.