Provided herein is a system for managing energy of a residential community sharing energy, the system including a plurality of home EMS (Energy Management System) provided in individual households; a unit for supplying common use energy having a production unit configured to produce common use energy, and a storage unit for charging the produced common use energy; and a residential community EMS configured to manage production and charging of the common use energy, and to control the unit for supplying the common use energy, in response to receiving a signal requesting to use the common use energy transmitted from a home EMS supply, supply the common use energy to the home EMS that transmitted the signal requesting to use the common use energy.