The nanocrystalline TiO2 film electrodes were prepared by sol-gel method at different calcin-ing temperatures, which had characteristics of dif-ferent film thickness, uniform transparency, as well as high photoelectric and mechanical stability. Photo-electric measurements show that calcining tempera-ture and film thickness could remarkably influence the photoelectric properties of the electrodes. The film calcined at 450℃ is anatase phase with high crystallinity and strong photoelectric activity, and shows the largest photocurrent. When the tempera-ture is lower than 450℃, the film has weaker crystal-linity because of a large number of defects in the film, and this is not favorable for the transport of the pho-togenerated carriers. And at a temperature higher than 450℃, the photocurrent of the electrode is de-creased due to anatase-rutile phase transition in the film. The increase in film thickness is favorable to the enhancement of ultraviolet light (UV) absorption amount, which would improve the photoelectric activ-ity of the film. But, excessive thickness will increase the recombination rate of the electron-hole pairs, and result in a reduction in electrode’s photoelectric ac-tivity. In addition, the response sensitivity and stability of the photocurrent produced in the electrode are related to bias potential. At a potential of 0.4 V, the electrode shows a saturated photocurrent of 30.8 μA and a response time of ~1 s, suggesting that the prepared TiO2 film electrode can be used for making UV sensors. The nanocrystalline TiO2 film electrodes were prepared by sol-gel method at different calcin-ing temperatures, which had characteristics of dif-ferent film thickness, uniform transparency, as well as high electrical and mechanical stability. Photo-electric measurements show that calcining tempera- ture and film thickness could remarkably influence the photoelectric properties of the electrodes. The film calcined at 450 ℃ is anatase phase with high crystallinity and strong has weaker crystal-linity because of a large number of defects in the film, and this is not favorable for the transport of the pho-togenerated carriers. And at a temperature higher than 450 ° C, the photocurrent of the electrode is de-creased due to anatase-rutile phase transition in the film. which increase in film thickness is favorable to the enhancement of ultraviolet light (UV) absorption amount, which would improve the photoelectric activ-ity of the film. But, excessive thickness will increase the recombination rate of the electron-hole pairs, and result in a reduction in the electrode’s ac- tivity. In addition, the response sensitivity and stability of the photocurrent At a potential of 0.4 V, the electrode shows a saturated photocurrent of 30.8 μA and a response time of ~ 1 s, suggesting that the prepared TiO2 film electrode can be used for making UV sensors.