Abstract: In this paper,ZnO thin film with good morphology and crystallization quality was first grown on the sapphire substrate of fiber-surface by electron-beam evaporation（EBV）.The influence of optical properties in different temperature was measured using a novel temperature measurement system.The transmittance spectra shows sharp optical absorption edge,and the influence of 400 ℃ annealing on the optical properties of the ZnO thin films on the sapphire substrate of fiber-surface shows that there is few influence of transmission on the ultraviolet（400-450 nm） band,not the same as visible-light（300-380 nm）band.This property reveals good temperature stabilization which supplies crucial evidences to further fabricate a fiber-optic temperature sensor based on semiconductor ZnO,using the influence of optical absorption spactra in different temperature.