This present disclosure relates to the speech processing technology, more specifically, to a microphone. A microphone with voice wake-up function includes a microphone body with at least one transducer for collecting sound signals, a control module and a determining module. The microphone body is performed in a sleeping mode or an operating mode through the control module in accordance with the determined result. The invention enables the microphone body to switch between the sleeping mode and the operating mode. The sleeping mode reduces unnecessary power consumption and saves electrical energy. When a certain condition is satisfied, the body of the microphone is activated from the sleeping mode and enters into the normal operating mode.