In a micro-grid grid connection system in an area without electricity which is provided by the invention, a wind and light storage system supplies power through inverters to resident loads accessed to the same alternating current bus through rectifiers, is connected with a direct current bus through the corresponding rectifiers, and supplies power to equipment accessed to the direct current bus; or, the wind and light storage system supplies power to resident loads accessed to the same direct current bus, supplies power to the other accessed direct current bus, and supplies power to equipment respectively accessed to the other direct current bus. Or, the wind and light storage system is connected with a medium voltage bus, and supplies power to loads directly accessed to each feeder line. In addition, the micro-grid grid connection system is provided with a diesel power generation system which performs auxiliary power supply to loads which need long-time electricity to be provided and loads which cannot be powered down. The micro-grid grid connection system aims to realize grid connection, uses the loads as boundary conditions, proposes a basic scheme of a micro-grid grid-connected system adapted to an urban power grid, and has relatively good engineering practicability.