A power supply for an electric device configured to receive a power on/off command and a driving command through a remote controller and connectable to the power supply as an electrical load, the power supply comprising: a first switch arranged between an input power supply unit and the load; a driving power supply unit (140, 160) to receive input power of the input power supply unit through the first switch and to supply the received input power to the load as driving power when a current mode of the load is a normal mode; and a power-saving power supply unit (130, 150) connected to a power line branched from a point between the input power supply unit and the first switch, the power-saving power supply unit (130, 150) generating standby power using the input power when the current mode of the load is a standby mode, characterised in that the power-saving power supply unit (130, 150) comprises: a second switch (133, 154) connected to the power line; a charging unit (136, 155) to be charged using power transmitted through the second switch and to output the charged power as the standby power; a voltage detector (138, 156) to detect a voltage of the power charged in the charging unit (136, 155); a first controller (139, 158) to receive driving power from the charging unit (136, 155) and to control an operation of the second switch (133, 154) according to the detected voltage; a voltage adjuster to adjust the voltage of the input power supplied through the power line (131, 151) to a voltage at a predetermined level; and a first power converter (134, 153) connected in parallel between the charging unit (136, 155) and a standby power output port to convert power corresponding to the adjusted voltage to the standby power and to output the standby power to the standby power output port. a first switch arranged between an input power supply unit and the load; a driving power supply unit (140, 160) to receive input power of the input power supply unit through the first switch and to supply the received input power to the load as driving power when a current mode of the load is a normal mode; and a power-saving power supply unit (130, 150) connected to a power line branched from a point between the input power supply unit and the first switch, the power-saving power supply unit (130, 150) generating standby power using the input power when the current mode of the load is a standby mode, characterised in that the power-saving power supply unit (130, 150) comprises: a second switch (133, 154) connected to the power line; a charging unit (136, 155) to be charged using power transmitted through the second switch and to output the charged power as the standby power; a voltage detector (138, 156) to detect a voltage of the power charged in the charging unit (136, 155); a first controller (139, 158) to receive driving power from the charging unit (136, 155) and to control an operation of the second switch (133, 154) according to the detected voltage; a voltage adjuster to adjust the voltage of the input power supplied through the power line (131, 151) to a voltage at a predetermined level; and a first power converter (134, 153) connected in parallel between the charging unit (136, 155) and a standby power output port to convert power corresponding to the adjusted voltage to the standby power and to output the standby power to the standby power output port. a second switch (133, 154) connected to the power line; a charging unit (136, 155) to be charged using power transmitted through the second switch and to output the charged power as the standby power; a voltage detector (138, 156) to detect a voltage of the power charged in the charging unit (136, 155); a first controller (139, 158) to receive driving power from the charging unit (136, 155) and to control an operation of the second switch (133, 154) according to the detected voltage; a voltage adjuster to adjust the voltage of the input power supplied through the power line (131, 151) to a voltage at a predetermined level; and a first power converter (134, 153) connected in parallel between the charging unit (136, 155) and a standby power output port to convert power corresponding to the adjusted voltage to the standby power and to output the standby power to the standby power output port.