In order to reduce the lens surface deformation when the temperature changes, the bonded lens can achieve better effect than the lens which is mounted by spacer and retainer. The radial stress of the bonded lens and surface deformation at 16 ℃, 20 ℃ and 26 ℃ are compared by theoretical calculation and simulation. Experiment is then made to prove that the surface deformation (PV value) of the bonded lens (0.073λ, 0.064λ, 0.085λ) is better than the mounted lens (0.204λ, 0.108λ, 0.105λ) at different temperatures. Finally, the error sources of the surface deformation about theoretical calculation, simulation and experiment at different temperatures are analyzed. Experimental results indicate that the surface accuracy of bonded lens is better than that of the mounted lens, and the bonded lens has less surface deformation when the temperature changes.