The intelligent integrated power supply system integrates dc operating power supply, special ac uninterruptible power supply or inverter power supply, dc switching power supply for communication and ac power supply for station. Through the field bus, realize the decentralized control and centralized management of each sub-power system, and realize the IEC61850 digital communication with the host computer system through Ethernet interface. The integrated uninterruptible power supply system reduces equipment configuration, battery and testing equipment, number of screen cabinets and installed building area, improves equipment reliability, data sharing and system analysis level, and is operated and maintained uniformly by the substation, reducing operation and maintenance personnel and workload, improving work efficiency and operation management economy