In the present invention, a biological signal of a subject is acquired and biological information is calculated from the acquired biological signal. When it is determined that the biological information is abnormal, depending on whether the biological information was calculated under a high-precision condition, notification is performed using a first standard in the case that the biological information was calculated under a high-precision condition, and when this is not the case, notification is performed using a second standard. An abnormality notification system is thereby provided whereby a reporting condition is changed in accordance with the precision of the determined biological information when it is determined that the biological information of the subject is abnormal, and necessary reporting can thereby be appropriately performed and unnecessary reporting can be suppressed.
