This project include study, removal of Azo carmine G dye from wastewater using aluminum oxide as catalyst and UV irradiation. Different parameters has been investigated such as the effect of catalyst loading, the influence of initial dye concentration, and the effect of intensity of light in order to reach to the optimum operational conditions in which the best removal of dye. The highest removal efficiency of Azo carmine G dye was indicated at 0.09 gm/100cm3 mass of aluminum oxide and 15 ppm of Azo carmine G dye. photocatalytic degradation of Azo carmine G dye was favorable in the 8.22 mW/cm2 light intensity. The percentage efficiency of removal Azo carmine G dye equals 92.86%.