An electrical power management device configured to manage a system having an energy generating device (1, 2), an electricity storing device (3, 4) which is a storage battery, an electrical heat storing device, and an electric load (21, 22, 23, 24), the electrical power management device comprising: - a communication unit configured to carry out an exchange of data with at least the electricity storing device (3, 4) and the electrical heat storing device; - an electricity storing device (3, 4) information acquisition unit configured to acquire information of the electricity storing device (3, 4) via the communication unit; - a heat storing device information acquisition unit configured to acquire information of the electrical heat storing device via the communication unit; - a power charge structure management unit configured to obtain and manage electricity charge structure information indicating a relation between each time period and an electricity charge; - a surplus power estimation unit configured to estimate surplus power corresponding to a difference between power generated by the energy generating device (1, 2) and power consumed by the electric load (21, 22, 23, 24); and - an energy storing device management plan formulation unit configured to compile operation plans of the electricity storing device (3, 4) and the electrical heat storing device, wherein, the energy storing device management plan formulation unit is configured to predict energy conversion efficiency of the electrical heat storing device at each time based on at least an external air temperature prediction information indicating predicted external air temperature, and is configured to calculate power consumption in the electrical heat storing device based on a result of the energy conversion efficiency prediction, and is configured to predict temperature of the storage battery at each time based on at least the external air temperature prediction information, and is configured to determine limit of charging and discharging of the electricity storing device (3, 4) based on a result of temperature prediction of the storage battery, and is configured to compile the operation plans of the electricity storing device (3, 4) and the electrical heat storing device based on the power consumption calculated by the electrical heat storing device, surplus power information estimated by the surplus power estimation unit, the determined limit of the electricity storing device (3, 4), and electricity charge structure information managed in the power charge structure management unit. - a communication unit configured to carry out an exchange of data with at least the electricity storing device (3, 4) and the electrical heat storing device; - an electricity storing device (3, 4) information acquisition unit configured to acquire information of the electricity storing device (3, 4) via the communication unit; - a heat storing device information acquisition unit configured to acquire information of the electrical heat storing device via the communication unit; - a power charge structure management unit configured to obtain and manage electricity charge structure information indicating a relation between each time period and an electricity charge; - a surplus power estimation unit configured to estimate surplus power corresponding to a difference between power generated by the energy generating device (1, 2) and power consumed by the electric load (21, 22, 23, 24); and - an energy storing device management plan formulation unit configured to compile operation plans of the electricity storing device (3, 4) and the electrical heat storing device, wherein, the energy storing device management plan formulation unit is configured to predict energy conversion efficiency of the electrical heat storing device at each time based on at least an external air temperature prediction information indicating predicted external air temperature, and is configured to calculate power consumption in the electrical heat storing device based on a result of the energy conversion efficiency prediction, and is configured to predict temperature of the storage battery at each time based on at least the external air temperature prediction information, and is configured to determine limit of charging and discharging of the electricity storing device (3, 4) based on a result of temperature prediction of the storage battery, and is configured to compile the operation plans of the electricity storing device (3, 4) and the electrical heat storing device based on the power consumption calculated by the electrical heat storing device, surplus power information estimated by the surplus power estimation unit, the determined limit of the electricity storing device (3, 4), and electricity charge structure information managed in the power charge structure management unit.