In order to better coordinate and control the energy transmission of the household-level DC microgrid system, a household energy router is proposed and its control strategy is analyzed. Under the proposed control strategy, the energy router performs coordinated control according to the DC bus voltage division. Each port operates in different states according to the local information of the port and the DC bus voltage. And all the ports coordinate to manage the energy router for seamless switching between various layers. For the energy storage port of the energy router, the supercapacitor and the battery are combined to store energy, which prolongs the service life of the battery and realizes stable operation of the system. Finally, the energy router system is built on Matlab/Simulink platform to verify the correctness of the proposed control strategy.