Terminal control method, device and terminal

Provided in embodiments of the present invention are a terminal control method, device and terminal. The method comprises: detecting whether a condition for enabling a power-saving mode is satisfied when a screen of a terminal is switched from a lit state to an unlit state; executing a power-saving operation when the condition for enabling the power-saving mode is satisfied, wherein the power-saving operation is configured to reduce power consumption of an application running in the background of the terminal. The present invention reduces the power consumption in the unlit state while allowing normal use for a user.