The invention relates to a control device and a control method for a wireless induction type power supply. The control device comprises a transmission control circuit and a reception control circuit. The control method includes the steps of generating a plurality of switching signals to switch to a transmitting winding and generate electric energy; detecting the level of a transmission signal transmitted by the transmission winding; and controlling a switch to transmit the electric energy from the transmission winding to a load. A receiving winding receives the electric energy from the transmission winding. If the duration of the level of the transmission signal lower than a threshold exceeds a first period, or the duration of the level of the transmission signal higher than the threshold exceeds a second period, the switching signal are disabled. The control device and the control method ensures the safety of the foreign object detection (FOD) function.