According to one embodiment, a wearable electronic device includes a first sensor, a second sensor and a hardware processor. The first sensor is configured to detect a motion of a user wearing the electronic device.The second sensor is configured to acquire biological information related to the user. The hardware processor is configured to determine whether the user is in an awake state or in an asleep state based on the detection value of the first sensor, and to control operation of at least one of the first sensor and the second sensor.
