Abstract: The invention provides an earphone device. The earphone device according the invention includes a housing, a transmitting/receiving unit, a processor, and a plurality of sensors. The processor is electrically connected to the transmitting/receiving unit and is disposed in the housing. The transmitting/receiving unit is disposed in the housing and is used to receive a trigger signal and to communicate with a communication apparatus. The sensors are disposed on the housing and are electrically connected to the processor. When the processor is driven by the trigger signal to activate the sensors, the processor receives sensed signals sent by the sensors and, according to the sensed signal and a plurality of predetermined values corresponding to the sensors, selectively determines a take-on mode.