Method for switching system power consumption modes

The invention discloses a method for switching system power consumption modes. A procedure for switching the system power consumption modes is divided into two levels including entering sleep modes from application program layers and entering the sleep modes from bottom drive program layers. The method includes entering sleep mode programs by the aid of application layers under the condition of the application program layers before entering the sleep modes and storing required-to-be-stored information in application programs in non-power-failure storage areas; calling bottom sleep mode entry programs, storing required-to-be-stored information of chips in the non-power-failure storage areas and marking sleep signs as effective; starting to execute software from start programs (bootloader) after awakening from the sleep modes, and calling bottom sleep mode recovery programs to recover the information of the chips after the fact that the sleep signs are effective is determined; recoveringthe information, which i