Air temperature, humidity, wind speed, surface energy over heterogeneous land surface in Jinta Oasis are simulated using RAMS. The results show that the near-surface temperature over oasis is obviously lower, and the near-surface atmospheric humidity over oasis is larger, compared with those over its surrounding Gobi and Desert. The sensible heat flux over oasis is only about 1/3 of that over Gobi and Desert, and the latent heat flux over oasis is 20 times larger than that over Gobi and Desert. Comparison of simulations and observations shows that the simulated air near-surface temperature, humidity, wind speed, sensible heat flux and latent heat flux are in agreement with the observed. The bias between simulated wind and observed wind velocity is relatively big because of randomicity of onflow, so the bias results mainly from nonlinear bias.