PROBLEM TO BE SOLVED: To provide a power management system capable of controlling the received power to approach a target value by using a plurality of in-vehicle batteries and charging each in-vehicle battery to each charging target value by a charging target time. .. A power management system includes a control device 16 that controls the charge / discharge power of an in-vehicle battery 1a, 1b, 1c to control the power received from a power system 10 of a commercial power source. The in-vehicle batteries 1a, 1b, 1c are connected to a commercial power source on the terminal side of the power receiving point 11 via the power conversion devices 4a, 4b, 4c. The control device 16 forcibly starts charging the in-vehicle batteries 1a, 1b, 1c so that the in-vehicle batteries 1a, 1b, 1c are charged to the respective charging target values at the respective charging target times. The power distribution of the charging power and the discharging power of each in-vehicle battery 1a, 1b, 1c is controlled according to the charging start time. [Selection diagram] Fig. 1
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