BaZrO₃/Au composites were synthesized by Incipient Wetness Impregnation (IWI), and Pd was selectively deposited on Au surface in BaZrO₃/Au through area selective-atomic layer deposition (AS-ALD). The morphology of BaZrO₃, Au, and Au-Pd was determined by SEM and TEM, which confirmed that Pd was successfully deposited on Au surface. The photocatalytic performance of BaZrO₃/Au and BaZrO₃/Au-Pd was studied by degrading RhB with UV irradiation. It was found that the introduction of Rd on Au surface could increase the photocatalytic performance of BaZrO₃/Au composites. The mechanism study showed that increased photocatalytic performance could be attributed to the increased electron/hole separation under irradiation.