Electric power management system and electric power management program

The herein disclosed electric power management system includes a shared power supply, and an electric power selling process unit that is configured to control the electric power sell from the shared power supply to the external system, and a countervalue distributing unit that is configured to distribute a countervalue for the electric power sell to each of the plural users. Then, the countervalue distributing unit is configured to distribute the countervalue for the electric power sell so as to provide a larger countervalue of the electric power sell to an user whose electric power use amount from the shared power supply is smaller. By doing this, it is possible to provide a larger electric power sell countervalue to the user who has efforted to save the electric power.