The invention provides a novel power supply system. The power supply system comprises a plurality of photovoltaic cell panels, a plurality of direct-current ammeter, a photovoltaic inverter, one or more wind driven generators, a diesel oil generator, a rectifier, a transformer, an energy storing device, an electricity generating receiving busbar, a central controller, a power supply busbar and a plurality of alternating-current electric energy meter. According to the power supply system provided by the invention, photovoltaic power generation systems for self use of residents are combined, unified direct-current electric energy storage is carried out, the size of power supply current is measured in real time through the direct-current ammeters or the electric energy meters, the power supply current is output to the central monitor, electric energy during photovoltaic peak power generation is converted into electric quantity, direct conversion network access of power generation for the residents is realized, and corresponding fee can be deducted from the generating capacity when the residents need electricity utilization. The residents at remote areas are encouraged to use photovoltaic power generation facility. The microgrid system provided by the invention is self-contained without external power supply, so that the construction and maintenance costs of electric transmission lines in the remote areas are reduced.