An information processing device for supporting construction of a network that is constituted by plural kinds of units (21, 22, 23, 24, 25), wherein the plural kinds of units (21, 22, 23, 24, 25) include: an electric power supply unit (21, 24, 25) configured to supply electric power to units (22, 23) connected downstream from the electric power supply unit (21, 24, 25), and a connected unit (22, 23) operating with a supply of electric power received from a unit (21, 22, 23, 24, 25) upstream from the connected unit (22, 23) and having a function of supplying remaining electric power to a unit downstream (22, 23) from the connected unit (22, 23), wherein the information processing device comprises: a memory portion configured to store an electric power consumed by the connected unit (22, 23) and an electric power that is suppliable by the electric power supply unit (21, 24, 25), a configuration portion for virtually configuring, in response to an input operation, a network including the connected unit (22, 23) and the electric power supply unit (21, 24, 25), a determination portion for determining, for each of the units (21, 22, 23, 24, 25) included in the virtually configured network, whether there is an overage or shortage of electric power to be supplied to the unit (21, 22, 23, 24, 25), on the basis of the electric power that is suppliable by the electric power supply unit (21, 24, 25) upstream from that unit (21, 22, 23, 24, 25), the electric power consumed by one or more connected units (22, 23) upstream from that unit (21, 22, 23, 24, 25), and the electric power consumed by that unit (21, 22, 23, 24, 25), and a display portion for displaying a state of the electric power supply for each of the units (21, 22, 23, 24, 25) included in the virtually configured network, depending on a determination result determined by the determination portion. an electric power supply unit (21, 24, 25) configured to supply electric power to units (22, 23) connected downstream from the electric power supply unit (21, 24, 25), and a connected unit (22, 23) operating with a supply of electric power received from a unit (21, 22, 23, 24, 25) upstream from the connected unit (22, 23) and having a function of supplying remaining electric power to a unit downstream (22, 23) from the connected unit (22, 23), a memory portion configured to store an electric power consumed by the connected unit (22, 23) and an electric power that is suppliable by the electric power supply unit (21, 24, 25), a configuration portion for virtually configuring, in response to an input operation, a network including the connected unit (22, 23) and the electric power supply unit (21, 24, 25), a determination portion for determining, for each of the units (21, 22, 23, 24, 25) included in the virtually configured network, whether there is an overage or shortage of electric power to be supplied to the unit (21, 22, 23, 24, 25), on the basis of the electric power that is suppliable by the electric power supply unit (21, 24, 25) upstream from that unit (21, 22, 23, 24, 25), the electric power consumed by one or more connected units (22, 23) upstream from that unit (21, 22, 23, 24, 25), and the electric power consumed by that unit (21, 22, 23, 24, 25), and a display portion for displaying a state of the electric power supply for each of the units (21, 22, 23, 24, 25) included in the virtually configured network, depending on a determination result determined by the determination portion.