Stand-by energy-saving air conditioner

This invention discloses a kind of stand by power-saving air conditioner. It includes: display part; controlling part which controls display part according to power providing situation; power supplying part which changes alternating current power supply into direct current power and supplies. The power supplying part also includes power controlling device that can cut off stand by power supply. The power controlling device is composed of switch connecting to fire line terminal of power line. Power controlling device cut off the power flowed into air conditioner. It cuts off the stand by power dissipated during air conditioner working under stand by mode which is to wait remote controller input. The working mode of air conditioner can be controlled through the displayed contents in the display part. When not using air conditioner for long time, it can cut off power simply by operating power controlling device, rather than manually separating power bolt from socket.