Utilizing the micrometeorology data of the intensive observation period in Dunhuang oasis in the Northwest arid region in 2009, the air exchanges and energy budgetare systemically analyzed, such as theand water vapor flux and CO₂ concentration, radiation budget, and energy balance. The result shows that: The and water vapor flux and CO₂ concentrationhave obvious diurnalvariation and the mean value are -0.023, 2.90 mg·m^-3·s^-1, respectively; the sensible heat, latent heat and soil heat have good correlation with the net radiation, and the mean ground surface albedo is 0.24; The sensible heat is the main factor of surface energy loss and the average value of Bowen ratio is 3.08, and there is a larger energy imbalance in the observation.