The Al₂MoZnO₇ (AMZ) nanocomposite had been successfully synthesized via co-precipitation method followed by a low temperature calcinations treatment process. It had been found that such an Al₂MoZnO₇ nanocomposites exhibits higher photocatalytic activity and stability than pure ZnO towards the aqueous phase degradation of acid orange II dye under visible light (400 nm < λ). The presence of Al³⁺/Mo⁶⁺/Zn²⁺ ions in Al₂MoZnO₇ and the formation of defects in the lattice are believed to play an essential role in influencing the photo-reactivity. The different types of active species scavengers are also play the photocatalytic process. The synthesized Al₂MoZnO₇ nanocomposites were characterized by UV-Vis spectroscopy, X-ray diffraction (XRD), SEM, TEM, EDAX and FTIR techniques. The average particle size and grain sizes of AMZ are around 6.5±0.3 nm and 50±5 nm measured from TEM and SEM respectively. The band gap energy AMZ and pure ZnO NPs was calculated from UV-Vis absorption and Tauc plot; and was found to be increased from 3.31 eV to 3.62 eV as Al and Mo co-doped in ZnO matrix. The optical absorption spectrum of ZnO NPs was blue shifted as co-doping of Al3+ and Mo6+ ions in ZnO particles. In photoluminescence study showed that the effect of Al and Mo doped in ZnO NPs and the UV-emission peak was appeared around 323 nm. Photocatalytic study revealed that AMZ nanocomposite exhibited maximum degradation 82% for acid orange II dye under visible light irradiation within 50 minutes.