An electric power supply device that supplies electric power to an object capable of receiving electric power supply, the electric power supply device comprising: a plurality of electric power supply spaces that are spaces in which a respective plurality of objects is located at the time of electric power supply; and an electric power supply apparatus capable of supplying electric power to the object located in the electric power supply space, characterised in that the electric power supply device is configured to: select, when receiving an electric power supply request, a specific electric power supply space that is a particular electric power supply space from among the plurality of electric power supply spaces; generate identification information associated with the specific electric power supply space; transmit the identification information to an object that has output the electric power supply request; receive the identification information from the object by communicating with the object located in the specific electric power supply space; and supply, from the electric power supply apparatus, electric power to the object located in the specific electric power supply space when the received identification information coincides with the identification information associated with the specific electric power supply space. a plurality of electric power supply spaces that are spaces in which a respective plurality of objects is located at the time of electric power supply; and an electric power supply apparatus capable of supplying electric power to the object located in the electric power supply space, characterised in that the electric power supply device is configured to: select, when receiving an electric power supply request, a specific electric power supply space that is a particular electric power supply space from among the plurality of electric power supply spaces; generate identification information associated with the specific electric power supply space; transmit the identification information to an object that has output the electric power supply request; receive the identification information from the object by communicating with the object located in the specific electric power supply space; and supply, from the electric power supply apparatus, electric power to the object located in the specific electric power supply space when the received identification information coincides with the identification information associated with the specific electric power supply space. select, when receiving an electric power supply request, a specific electric power supply space that is a particular electric power supply space from among the plurality of electric power supply spaces; generate identification information associated with the specific electric power supply space; transmit the identification information to an object that has output the electric power supply request; receive the identification information from the object by communicating with the object located in the specific electric power supply space; and supply, from the electric power supply apparatus, electric power to the object located in the specific electric power supply space when the received identification information coincides with the identification information associated with the specific electric power supply space. <EOS>