Abstract: In order to fabricate fiber-optic temperature sensors based on ZnO film,it is important to study the temperature-dependent optical properties of ZnO materials deposited on fiber ends.In this paper, ZnO thin film was grown on sapphire fiber ends by electron-beam evaporation（EBV）and a novel fiber-optic measurement system was designed to analyze the optical properties based on the temperature measurement principle of ZnO materials.When the temperature increases（room temperature to 450℃）, the band gap decreases,the average transmittivity decreases slightly,and the absorption edge has a red shift,in accordance with the temperature-dependent properties of semiconductors.These properties will supply crucial evidences to further fabricate a fiber-optic temperature sensor based on semiconductor ZnO,utilizing the influence of optical absorption spectra in different temperatures.