An object of the invention is to reduce an inconvenience in which power consumption from a commercial power supply exceeds a predetermined threshold. To achieve the object, there is provided a power management apparatus (1) including: a load monitoring unit (10) that specifies a timing, at which power consumption of a predetermined load (3) present in a unit power network (100) exceeds a predetermined value, before the timing; and a power storage system control unit (20) that controls the power storage system (2) supplying power to the unit power network (100) to start power supply a predetermined period of time before the timing.