Traditional central power supply and distributed generation have the advantages and limitations themselves.Microgrid technology can integrate the advantages of distributed generation and that makes for large scale new energy and renewable energy power generation system connected to the grid.First,the definition and the basic structure of microgrid are represented,then the main forms of distributed resources and storage energy are introduced.Three kinds of control strategies for microgrid are offered preliminarily.In the end,emphasis is put forward for future research in microgrid.