Abstract: Based on the observational data from the photovoltaic power station in the Gobi in Wujiaqu on sunny days in summer,the characteristics of surface radiation and energy budget were analyzed. The results showed that the total daily values of downward shortwave radiation, upward shortwave radiation, downward longwave radiation, upward longwave radiation and net radiation are respectively 27.82,3.93,32.31,41.22,14.97 MJ/m~2. The weighted average of albedo is about 0.14. Sensible heat is the main form of heat transfer between the surface and atmosphere,and the average of Bowen ratio at daytime is about 5. As the soil depth increases,the daily variation amplitude of soil heat flux and soil temperature decreases. The temperature of the photovoltaic module is higher than air temperature at daytime and lower at night. After considering the 0-5 cm soil heat storage,the energy balance ratio increases from 0.59 to 0.66. The mean value of the bulk transfer coefficient for heat is 4.61×10^-3.