A system configuration creation supporting device includes: a display unit to display a network configuration diagram in which a first object and a second object within a first network level of a plurality of network levels are arranged, the first object being an image representing a network, the second object being an image representing a node connected to the network; and a data processing unit to calculate, on the basis of the first network level, coordinates for displaying the first and second objects on the display unit, and display on the display unit the network configuration diagram according to the first network level on the basis of the calculated coordinates.