The electric-field control of resistance and magneto-optical Kerr effect of all-solid-state Au/Ti/Y2CeFe5O12 multilayer structure is realized at room temperature. At 635 nm wavelength, the rangeability of saturation magneto-optical Kerr rotation angle is 58.1 μrad under the operation voltage of 1.5 V. The corresponding energy dissipation is 0.66 nJ·μm-2 and the response time is 300 s. Moreover, the control is reversible and non-volatile. The critical effect of Ti layer on such a modulation is disclosed by contrast to Au/Y2CeFe5O12. The occurrence of oxygen ion migration is confirmed via the characterization for the change of electrical resistance of multilayer structure under the effect of electric field. The oxygen ion migration is the mechanism of electric-field control of magneto-optical effect. This prototype device offers a new way to develop electric-field tunable magneto-optical devices.Key words