A power controller (100) is for controlling power consumed in an information processor (1000) and includes a power context storing means (ZA105), a power context reference means (ZB101), and a power status changing means (ZA101). The power context storing means (ZA105) stores power control information for individual programs on a per program basis in storage regions distinguished with program identification information. The power context reference means (ZB101) references the power control information for the desired program in the power context storing means (ZA105). The power status changing means (ZA101) changes the status of the power consumed in the information processor (1000) based on the power control information referenced by the power context reference means (ZB101).