An induction heat cooking apparatus, further comprising: a first heating coil configured to be operated by a first power; a second heating coil configured to be operated by a second power different from the first power and placed outside of the first heating coil; a first inverter comprising a first switching circuit configured to apply the first power to the first heating coil and a first controller configured to control the first switching circuit; and a second inverter comprising a second switching circuit configured to apply the second power to the second heating coil and a second controller configured to control the second switching circuit, wherein the first inverter further comprises a first signal transmitter configured to control operation of the second switching circuit, wherein the first controller is configured to use the first signal transmitter to match an operating frequency of the second switching circuit with an operating frequency of the first switching circuit, characterized in that the first signal transmitter is an insulated signal transmitter, wherein a first terminal for receiving a control signal from the first controller and a second terminal for transmitting the control signal to the second switching circuit are electrically insulated, that the second inverter further comprises a second insulated signal transmitter configured to control operation of the first switching circuit, that the second controller is configured to use the second insulated signal transmitter to match the operating frequency of the first switching circuit with the operating frequency of the second switching circuit, and that when the second insulated signal transmitter is operated, the first controller and the first insulated signal transmitter are not operated. a first heating coil configured to be operated by a first power; a second heating coil configured to be operated by a second power different from the first power and placed outside of the first heating coil; a first inverter comprising a first switching circuit configured to apply the first power to the first heating coil and a first controller configured to control the first switching circuit; and a second inverter comprising a second switching circuit configured to apply the second power to the second heating coil and a second controller configured to control the second switching circuit, wherein the first inverter further comprises a first signal transmitter configured to control operation of the second switching circuit, wherein the first controller is configured to use the first signal transmitter to match an operating frequency of the second switching circuit with an operating frequency of the first switching circuit, characterized in that the first signal transmitter is an insulated signal transmitter, wherein a first terminal for receiving a control signal from the first controller and a second terminal for transmitting the control signal to the second switching circuit are electrically insulated, that the second inverter further comprises a second insulated signal transmitter configured to control operation of the first switching circuit, that the second controller is configured to use the second insulated signal transmitter to match the operating frequency of the first switching circuit with the operating frequency of the second switching circuit, and that when the second insulated signal transmitter is operated, the first controller and the first insulated signal transmitter are not operated.