Abstract: A wearable device includes: a biological information acquisition device that acquires biological information of a subject; a biological information storage device that stores biological information; an abnormality determination device that determines whether or not there is an abnormality and an abnormality level in the biological information of the subject; a notification destination determination device that, if an abnormality has occurred in the biological information of the subject, acquires notification destination information that corresponds to the abnormality level that was determined by the abnormality determination device; a notification destination database in which notification destination information for use when an abnormality has occurred in the biological information of the subject is stored for each abnormality level in advance; and a notification device that transmits information that includes the abnormality level and the determination result of the abnormality determination device to a not