In this paper, pulsed laser deposition method was applied to grow ZnO films in different temperature, with ZnO ceramics as target, sapphire Al2O3 (0001) for substrate, and using the pulsed laser GCR-170 Nd∶YAG by Spectra-Physics. The thin film structure and superficial morphology quality have been researched in experiment by atomic force microscope (AFM), photoluminescence (PL) and optical transmission spectrum, and optimize growth temperature was found to be 500 ℃ at which the ZnO films could obtain high-quality surface. The high violet light radiation have been found in experiment. The optical transmission spectrum versus the substrate temperature results showed that for the ZnO thin films prepared on sapphire, the surface morphology quality of the ZnO thin film was enhanced with increasing the substrate temperature from room temperature to 500 ℃.