Electronic device control system, control device for electronic device, and power control system

The present invention provides a control device for controlling an external electronic device, which performs feedback loop control through comparison between a sensor value input to a sensor input terminal and a set value, wherein the control unit is disposed between measurement signal lines connecting the electronic device to a sensor, and comprises: a sensor input unit which is connected to the sensor, receives a first sensor signal from the sensor, and measures a sensor value of the sensor; a communication unit for transmitting and receiving data with a remote controller and receiving a control signal corresponding to a set value for the electronic device from the remote controller through the data; a control unit for determining an output sensor value according to the control signal and the sensor value of the sensor; and a sensor output unit which is connected to a sensor input terminal of the electronic device and outputs the output sensor value to the sensor input terminal of the electronic device, the output sensor value being output using a second sensor signal, the type of which is the same as the first sensor signal.