POWER MANAGEMENT METHOD OF SYSTEM AND RELATED INTERNET DATA CENTER

A system includes at least one server and a power supply having multiple power supply units. After system boot-up, all power supply units in the power supply are turned on for supplying power to the at least one server. Next, the maximum output power value of the power supply and the conversion efficiency table containing the relationship between the loading rate and the conversion efficiency of the power supply are acquired, and the real-time conversion efficiency of the power supply is calculated. When it is determined based on the real-time conversion efficiency and the conversion efficiency table of the power supply that the power supply is not currently operating with an optimized conversion efficiency, one or more power supply units in the power supply are turned off or turned on according to a predetermined rule.