Control method of electromagnetic stirring device for melting furnace of metallic material in which a melting process occurs, in which the furnace includes a metal bottom wall covered with refractory material, the stirring device being placed below the furnace at the bottom wall, in which below is referred to with respect to the gravity direction, the stirring device generating an electromagnetic force field which is at least partially situated inside the furnace for electromagnetic stirring action on metallic material in the melted state contained inside the furnace, the stirring device comprising a control unit of the stirring device, in which the method includes a control phase of a driving power of the stirring device, in which the stirring device further includes at least one sensor for measuring the thickness of the refractory material of the furnace, the sensor for measuring the thickness being installed in the refractory material, the control unit including a controller for reception of measuring of thickness of the refractory material by means of the measuring sensor, the controller comprising processing means configured for determining the driving power of the stirring device depending on the measure of thickness of the refractory materials, the method further comprising a regulation phase of the driving power of the stirring device in which the regulation phase of the power includes the following steps: - acquisition by the control unit of a measure of thickness of the refractory material by means of the measuring sensor during the melting process; - regulation of the driving power of the stirring device depending on the measure of thickness of the refractory material; characterised in that the regulation phase of the driving power of the stirring device depending on the measure of thickness of the refractory material is such that a reduction of the measure of thickness corresponds to a reduction of the driving power of the stirring device, the control method including an initial calibration phase comprising an acquisition phase of a measure of initial thickness of the refractory material by means of the measuring sensor in condition of absence of erosion of the refractory, the regulation phase of the power depending on the measure of thickness of the refractory material including: - a comparison phase between the measure of thickness of the refractory material during the melting process and the measure of initial thickness, - a calculation phase of the power for maintenance of a target value of stirring speed of the metallic material in the melted state depending on the reduction of the thickness of the refractory material during the melting process, the regulation phase being a setting phase of a control signal of current of the electromagnetic stirring device, in which the current control signal is calculated depending on the difference between the measure of initial thickness and the measure of thickness of the refractory material during the melting process, in such a way that actual stirring speed of the metallic material in the melted state is independent of the erosion condition of the refractory material. - acquisition by the control unit of a measure of thickness of the refractory material by means of the measuring sensor during the melting process; - regulation of the driving power of the stirring device depending on the measure of thickness of the refractory material; - a comparison phase between the measure of thickness of the refractory material during the melting process and the measure of initial thickness, - a calculation phase of the power for maintenance of a target value of stirring speed of the metallic material in the melted state depending on the reduction of the thickness of the refractory material during the melting process,