Method and device for adjusting terminal standby duration and terminal

The invention discloses a method for adjusting terminal standby duration, wherein when an instruction of adjusting the terminal standby duration is received, a standby duration adjustment interface is displayed; to-be-updated standby duration which is input by a user based on the standby duration adjustment interface is received; and when the to-be-updated standby duration is received, an operation state of a terminal is adjusted according to a current residual electricity quantity of the terminal and operation state information corresponding to the to-be-updated standby duration, so that the terminal standby duration can be adjusted into the to-be-updated standby duration. The invention also discloses a device for adjusting the terminal standby duration and the terminal. The method, device and terminal disclosed by the invention have the advantages that the terminal standby duration can be adjusted intelligently and automatically.