Power supply system for air conditioner and power supply method

The invention relates to a power supply system for an air conditioner. The system comprises a Boost converter module, a switching power supply module, a variable frequency inverse module and an intelligent control module. The power supply system makes an air conditioning system used more economically and conveniently in a direct-current low-voltage power supply network, enlarges application range of the air conditioner, improves working efficiency, and reduces production cost.