Controlling the magnetism by means of electric fields is a key issue for the future development of low-power spintronics1. Usually, electric-field can control the magnetic materials by oxide-gate structures2. But this approach has a low regulatory capacity drawback than a way of controlled on BaTiO3 (BTO) by the magnetoelectricity coupling, such as the experiments of FeRh/BaTiO33, BaTiO3/La0.67Sr0.33MnO4 and Pb(Mg1/3Nb2/3)0.7Ti0.3O3/Co40Fe40B205. FeGa alloy and BTO oxide are laminated to form heterostructure for high magnetoelectricity6. Ga could contribute to preferential magnetization along the <100> direction in FeGa alloys and thus create anisotropy in the material, which is higher than the pure Fe7. Here we report the magnetic control of FeGa thin films on BaTiO substrate by electric field.