Metal oxide catalyst, CuO/ZnO/Ga2O3 was synthesized by oxalate co-precipitation methodat the concentration ratio ofCuO/ZnO at 2:1 and 9% by weight of Ga loading. They were characterized in details, including X-ray diffraction (XRD), dissociative N2O adsorption technique, temperature-programmed reduction (TPR) and temperature-programmed desorption (TPD) of CO2 method. Catalytic activity test in methanol synthesis by CO2 hydrogenation were carried out under elevated pressure of CO2/H2 gas mixture (30 bar) at reaction temperature (150 oC) in a slurry reactor by using alcohol as a catalytic solvent. With the same molar ratio (Cu/Zn = 2:1), the reducibility of CuO/ZnO/Ga2O3 was found to be more facile than CuO/ZnO. The fraction of strong basic site to the total basic sites over CZG_G9 was significantly larger than of a commercial CuO/ZnO/Al2O3 catalyst (1.8 times by mass), although both catalysts were slightly different for the total basic density. Moreover, the result of catalytic solvents indicated that 2-butanol provides the better stability of catalyst in the methanol synthesis, when compared to 2-propanol solvent.