A running watch which is a wearable device includes a position detection unit (a GPS module), a sensor unit including at least one of an acceleration sensor, a geomagnetic sensor, and an atmospheric pressure sensor, and a processing unit electrically connected to the position detection unit and the sensor unit. The processing unit determines a behavior state of a user based on signals from the position detection unit and the sensor unit and controls at least two of the position detection unit, the acceleration sensor, the geomagnetic sensor, and the atmospheric pressure sensor based on the behavior state.