A method and apparatus for mobile terminal power management is provided in this invention, which belongs to communication field. The method comprises: obtaining a reserving condition and power consumption per unit time of an application requiring power reservation, the reserving condition comprising a reserving time; according to the reserving condition and the power consumption per unit time, calculating an amount of power required to be reserved for the application; and reserving power for the application according to the amount of power required to be reserved for the application. The apparatus comprises: an obtaining module, a calculation module, and a power reservation module. Through calculating an amount of power required to be reserved during a reserving period of time for the application requiring power reservation, this invention can guarantee the use of an important application or application of priority as selected by a user.