Based on Andrews and Philips classical wander variance model, combining with the cross spectral density function of partially coherent light Airy and Tatarskii power spectrum, the coherent analytical formulas of expansion and wander of Airy beam in atmosphere transmission were deduced. The influence of the parameters such as the different truncation, the turbulence intensity and the coherence on the expansion and wander of Airy beam was analyzed. Then the results were compared with the results of Gaussian beam. The study has shown that, the different truncation, turbulence intensity and coherence have the bigger influence on beam wander, the more their value is, the more serious the wander will be. The inner scale has so little effect on the beam wander that can be ignored. Under the same conditions, Airy beam wander is two orders of magnitude smaller than that of the Gaussian beam, and itself has self recovery characteristic and strong inhibition of turbulence characteristic.