An aspect of the disclosure relates to a power-saving control system using remote-control communication. In this power-saving control system, a remote-control transmitting device is embedded in one of a lighting device, a sensor, and a sensor-embedded program switch, which are installed in a space, so as to remotely control a control target device installed in the corresponding space, and a predetermined control signal such as a power-off command is transmitted to the control target device if no person exists in the space for a predetermined time, or if a measured temperature or the like satisfies a condition, such that the control target device can be remotely controlled.