The invention discloses an ultra-low power consumption standby power supply device. The ultra-low power consumption standby power supply device is a standby power supply adopting a dual structure of base power supply and drive power supply. A switch transformer (3-7) and a switch triode (3-9) are taken as cores, and the components are connected into a switch power supply. A high-frequency alternating current output from the fifth pin of the switch transformer (3-7) is rectified via a diode (3-2), connected to an input end (H-2) of a three-terminal regulator, and filtered via capacitors (3-14) (3-3); an output end (H-3) of the three terminal-regulator outputs the base power supply (VCC); the power supply (VCC) is maintained and controlled with a low current under the condition that the start-up of an infrared receiver (4) is satisfied; when a silicon controlled rectifier (2-1) is triggered and broken over, a high voltage (VDD) is applied to the input end (H-2) of the three-terminal regulator through a strong drive current of the silicon controlled rectifier (2-1) via the diode (2-2), so that the safe and steady operation of the controlled device is ensured. The intelligent control of various devices can be realized, and without changing the traditional operation habits, the standby power consumption is decreased to ultralow power consumption which is below 0.008W and close to zero, so that the economic benefits and the social benefits brought for the energy conservation and emission reduction for improving the earth's environment are immeasurable.