Provided are a mobile device and a method for changing a content display of a mobile device. More particularly, provided are a mobile device in which a displayed content changes when a user's visual fatigue increases, and a method for changing a content display of a mobile device. Some of the disclosed embodiments provide a mobile device in which visual fatigue is calculated by using brainwave information of a user which is received from a wearable device, and when the calculated visual fatigue increases, a displayed content changes to another content; and a method for changing a content display of a mobile device.