A control device for use in a first node of a power supply system comprising a plurality of nodes including the first node for interchanging direct-current power through a power line connecting the plurality of nodes, the control device comprising: a power control unit configured to - acquire profile information of each of the plurality of nodes, the profile information including information on at least one of the amount of power generated by each of the plurality of nodes, the amount of power used by each of the plurality of nodes, the amount of power supplied from each of the plurality of nodes to another node and the amount of power received by each of the plurality of nodes from another node, - automatically determine a second node (100b-100f) of the plurality of nodes for performing transmission or reception of direct-current power to or from the first node based on the acquired profile information, wherein the power control unit is configured to determine a schedule of the transmission or reception of direct-current power between the first node and the second node (100b-100f) on the basis of information on previous power exchange included in the profile information; and a display control unit configured to display the profile information such that all of the profile information of the first node is displayed and a part of the profile information of the second node (100b-100f) is concealed. a power control unit configured to - acquire profile information of each of the plurality of nodes, the profile information including information on at least one of the amount of power generated by each of the plurality of nodes, the amount of power used by each of the plurality of nodes, the amount of power supplied from each of the plurality of nodes to another node and the amount of power received by each of the plurality of nodes from another node, - automatically determine a second node (100b-100f) of the plurality of nodes for performing transmission or reception of direct-current power to or from the first node based on the acquired profile information, wherein the power control unit is configured to determine a schedule of the transmission or reception of direct-current power between the first node and the second node (100b-100f) on the basis of information on previous power exchange included in the profile information; and - acquire profile information of each of the plurality of nodes, the profile information including information on at least one of the amount of power generated by each of the plurality of nodes, the amount of power used by each of the plurality of nodes, the amount of power supplied from each of the plurality of nodes to another node and the amount of power received by each of the plurality of nodes from another node, - automatically determine a second node (100b-100f) of the plurality of nodes for performing transmission or reception of direct-current power to or from the first node based on the acquired profile information, wherein the power control unit is configured to determine a schedule of the transmission or reception of direct-current power between the first node and the second node (100b-100f) on the basis of information on previous power exchange included in the profile information; and a display control unit configured to display the profile information such that all of the profile information of the first node is displayed and a part of the profile information of the second node (100b-100f) is concealed.