An earphone device including a main body, a speaker, a control element, a pressure sensor, and a touch sensor is provided. The speaker is disposed in the main body for dividing the main body into a front chamber and a rear chamber. The control element is disposed in the rear chamber. The pressure sensor is disposed in the front chamber, is coupled to the control element, is configured to sense a pressure change in the front chamber, and accordingly generates a pressure-sensing signal. The touch sensor is disposed in the rear chamber, is coupled to the control element, is configured to sense a first external touch applied to the main body, and accordingly generates a first trigger-sensing signal. The control element automatically controls an action of the earphone device according to the pressure-sensing signal and the first trigger-sensing signal.