The variation of land surface albedo (LSA), as an important parameter controlling surface energy balance, has great impact on air temperature and precipitation and further on regional and global climate. In order to investigate influence of LSA on accuracy of air temperature simulation, three numerical experiment schemes: control experiment, sensitive experiment and sensitive experiment of MODIS product (ME), were designed in this paper. Results show that: (1) if LSA is increased (decreased) by 0.05, air temperature change amplitude decreases from urban to rural, the air temperature will be decreased (increased) by 0.1-0.5 K, and sensible and latent heat fluxes will be decreased (increased) by 0-13 W/m²; (2) simulated temperature is lower than observed, but applying MODIS LSA product for ME can increase temperature by 0.2-0.7 K, so it is a reasonable way to improve the accuracy of air temperature simulation.