Nanozymes are promising synthetic alternatives to natural enzymes owing to their unique physical and chemical properties, but improving their thermocatalytic activity often involves complex procedures. This study introduces a light-induced approach to enhance the catalytic activity of facilely prepared porous cerium oxide ( ) nanozymes. Under visible light irradiation, the catalytic efficiency of the more than doubles compared to its thermocatalytic efficiency. Spectroscopic analyses reveal that this enhancement stems from a ligand-to-metal charge transfer (LMCT) band, arising from peroxide species adsorbed on the surface. As a practical demonstration, P-CeO2 exhibits visible-light enhanced scavenging of reactive oxygen species (ROS) . Overall, this study provides new mechanistic insights of using LMCT-induced visible light catalysis for the improvement of catalytic activity of light-responsive nanozymes.