The invention discloses a method and a device for adjusting wakeup time according to power information and a terminal. The method includes setting up a first regulation relation between residual power information of a battery and wakeup time information of a system by the terminal; adjusting the wakeup time according to the first regulation relation. Wakeup time of an application program for the system changes as change of left power of the battery. When the left power is too low, wakeup time of the application program for the system is prolonged correspondingly; when the left power is high enough, wakeup time of the application program for the system is shortened correspondingly. Accordingly, users can acquire pushing messages of the application program in time, and on the basis of using experience of the terminal, battery consumption of the terminal is reduced and battery life of the terminal is longer.