Abstract: As the core equipment of energy internet,energy router is able to achieve efficient configuration of various facilities in energy networks. Firstly, the definition and the basic framework of the cyber physical system are described in this paper, and the general research of energy router at home and abroad is studied. Then,the topology of the energy router is put forward, and the functional requirements of the energy router is given based on the structure of the energy internet. Finally,key technologies of energy router are analyzed and their future development directions are pointed out.