A grid integrated control apparatus that controls distributed grids, wherein each of the grids includes: a power transmission and reception unit that transmits and receives power between the grid and other grids through a power transmission line; and a grid control unit that controls the power transmission and reception unit on the basis of a control instruction received from the grid integrated control apparatus connected through a communication line, wherein at least one of the grids includes a distribution unit that distributes power to a consumer consuming power, and the grid integrated control apparatus comprises: a supply and demand energy information receiver unit that receives, for each of the grids, supply and demand energy information indicating a difference between supply energy from the grid to other grids and supply energy to the grid from other grids; a cost information receiver unit that receives cost information indicating a cost required for power transmission between the grids; and a grid control instruction generation unit that performs: determining a combination of: the grid that supplies power; the grid that receives power; and transmitted energy, on the basis of the supply and demand energy information received by the supply and demand energy information receiver unit and the cost information received by the cost information receiver unit; generating the control instruction for controlling power transmission of each of the grids on the basis of the determined combination; and transmitting the control instruction to each of the grids. wherein each of the grids includes: a power transmission and reception unit that transmits and receives power between the grid and other grids through a power transmission line; and a grid control unit that controls the power transmission and reception unit on the basis of a control instruction received from the grid integrated control apparatus connected through a communication line, wherein at least one of the grids includes a distribution unit that distributes power to a consumer consuming power, and the grid integrated control apparatus comprises: a supply and demand energy information receiver unit that receives, for each of the grids, supply and demand energy information indicating a difference between supply energy from the grid to other grids and supply energy to the grid from other grids; a cost information receiver unit that receives cost information indicating a cost required for power transmission between the grids; and a grid control instruction generation unit that performs: determining a combination of: the grid that supplies power; the grid that receives power; and transmitted energy, on the basis of the supply and demand energy information received by the supply and demand energy information receiver unit and the cost information received by the cost information receiver unit; generating the control instruction for controlling power transmission of each of the grids on the basis of the determined combination; and transmitting the control instruction to each of the grids. a power transmission and reception unit that transmits and receives power between the grid and other grids through a power transmission line; and a grid control unit that controls the power transmission and reception unit on the basis of a control instruction received from the grid integrated control apparatus connected through a communication line, wherein at least one of the grids includes a distribution unit that distributes power to a consumer consuming power, and the grid integrated control apparatus comprises: a supply and demand energy information receiver unit that receives, for each of the grids, supply and demand energy information indicating a difference between supply energy from the grid to other grids and supply energy to the grid from other grids; a cost information receiver unit that receives cost information indicating a cost required for power transmission between the grids; and a grid control instruction generation unit that performs: determining a combination of: the grid that supplies power; the grid that receives power; and transmitted energy, on the basis of the supply and demand energy information received by the supply and demand energy information receiver unit and the cost information received by the cost information receiver unit; generating the control instruction for controlling power transmission of each of the grids on the basis of the determined combination; and transmitting the control instruction to each of the grids. a supply and demand energy information receiver unit that receives, for each of the grids, supply and demand energy information indicating a difference between supply energy from the grid to other grids and supply energy to the grid from other grids; a cost information receiver unit that receives cost information indicating a cost required for power transmission between the grids; and a grid control instruction generation unit that performs: determining a combination of: the grid that supplies power; the grid that receives power; and transmitted energy, on the basis of the supply and demand energy information received by the supply and demand energy information receiver unit and the cost information received by the cost information receiver unit; generating the control instruction for controlling power transmission of each of the grids on the basis of the determined combination; and transmitting the control instruction to each of the grids.