An energy management method comprising: a step A of outputting, by a fuel cell apparatus provided in each of a plurality of facilities, power using fuel; a step B of managing, by an energy management apparatus, a storage amount of the fuel stored in a storage tank shared by the plurality of facilities; and a step C of allocating, by the energy management apparatus, the storage amount of the fuel to each of the plurality of facilities, characterized in that the step C includes a step of: evenly allocating, by the energy management apparatus, the storage amount of the fuel, or allocating, by the energy management apparatus, the storage amount of the fuel based on any one of: a history of power consumption of each of the plurality of facilities, rated output power of the fuel cell apparatus provided in each of the plurality of facilities, a remaining charge of a storage battery apparatus provided in one or more facilities among the plurality of facilities, a power generation prediction amount of a solar cell apparatus provided in one or more facilities among the plurality of facilities, and a timing at which replenishment of the fuel to the storage tank resumes, wherein the step of allocating includes a step of transmitting a message indicating allocated result to each of the plurality of facilities. a step A of outputting, by a fuel cell apparatus provided in each of a plurality of facilities, power using fuel; a step B of managing, by an energy management apparatus, a storage amount of the fuel stored in a storage tank shared by the plurality of facilities; and a step C of allocating, by the energy management apparatus, the storage amount of the fuel to each of the plurality of facilities, characterized in that the step C includes a step of: evenly allocating, by the energy management apparatus, the storage amount of the fuel, or allocating, by the energy management apparatus, the storage amount of the fuel based on any one of: a history of power consumption of each of the plurality of facilities, rated output power of the fuel cell apparatus provided in each of the plurality of facilities, a remaining charge of a storage battery apparatus provided in one or more facilities among the plurality of facilities, a power generation prediction amount of a solar cell apparatus provided in one or more facilities among the plurality of facilities, and a timing at which replenishment of the fuel to the storage tank resumes, wherein evenly allocating, by the energy management apparatus, the storage amount of the fuel, or allocating, by the energy management apparatus, the storage amount of the fuel based on any one of: a history of power consumption of each of the plurality of facilities, rated output power of the fuel cell apparatus provided in each of the plurality of facilities, a remaining charge of a storage battery apparatus provided in one or more facilities among the plurality of facilities, a power generation prediction amount of a solar cell apparatus provided in one or more facilities among the plurality of facilities, and a timing at which replenishment of the fuel to the storage tank resumes, wherein a history of power consumption of each of the plurality of facilities, rated output power of the fuel cell apparatus provided in each of the plurality of facilities, a remaining charge of a storage battery apparatus provided in one or more facilities among the plurality of facilities, a power generation prediction amount of a solar cell apparatus provided in one or more facilities among the plurality of facilities, and a timing at which replenishment of the fuel to the storage tank resumes, wherein the step of allocating includes a step of transmitting a message indicating allocated result to each of the plurality of facilities.