Due to a lack of field-measured data and incomplete consideration of variability in land surface coverage, this paper selected five automatic meteorological monitoring stations at Huitengliangwind power base in China. By comparing the variability of temperature and specific humidity inside the wind farm, and in the upwind, downwind and side wind directions, daily and seasonal variations in temperature and specific humidity were obtained. Finally, the influence of wind turbine operation on the atmospheric temperature and specific humidity of typical steppe was judged. It is found that wind turbines increase the temperature and decrease the specific humidity of the atmosphere. These effects are most obvious in the upwind and downwind directions. The annual average temperature rise was 1.07 ℃ in the upwind direction and 1.25 ℃ in the downwind direction. On average throughout the year, specific humidity decreased by 0.17 g·kg^-1 in the upwind direction and 0.16 g·kg^-1 in the downwind direction. The magnitudes of "warming" and "reducing specific humidity" of wind farms may change the grassland ecosystem process, so the better understand should be needed in the impact of wind power generation on the environment while building wind farms.