TiO_2 thin film and Fe_2O_3/TiO_2 and Cr_2O_3/TiO_2 thin films were prepared by the photodepositing method on soda lime glass substrates. The results of SEM showed that the surface of Fe_2O_3/TiO_2 thin film was occupied by grain-like oxides while the surface of Cr_2O_3/TiO_2 thin film by net-like particles. The hydrophilicities of TiO_2 thin films increased with the doping of Fe~(3+)/Cr~(3+). The photocatalytic activities of TiO_2 films in photodegradation of methylene orange solution increased with the do...