Abstract: Cu-based quantum dots are easy to synthetize and can replace dye,Cd S quantum dots and etc.,as sensitizer of TiO₂ due to their advantages of low cost,non-toxic,good catalytic activities,and narrow band gap. The progresses in in-situ or ex-situ deposition of Cu-based quantum dots on TiO₂,the photon absorption abilities and the charge transfer properties of TiO₂ sensitized by Cu-based quantum dots,and their applications in different fields were reviewed in this paper. In addition,research focused on TiO₂ sensitized by Cu-based quantum dots for photocatalytic hydrogen production in the near future were also analyzed and discussed.