To provide a watching system capable of watching a patient by treating and taking care of him or her on the basis of common biological signals, in various medical fields at a hospital, a clinic, and at home.SOLUTION: Biological information of a user is detected and illuminance and noise of an environment are further detected. Then, accuracy of the biological information is determined on the basis of the illuminance and noise. When the biological information is accurate, abnormality determination is performed using the biological information. When the biological information is not accurate, abnormality determination is performed using biological information obtained by correcting the biological information on the basis of the illuminance and the noise. At this time, when a desired number of biological information of a first user is accumulated in a storage unit, a second reference obtained by adjusting a first reference is calculated using machine learning, and the abnormality of the first user is determined on the basis of the biological information or the corrected biological information of the first user and the second reference.SELECTED DRAWING: Figure 2【課題】病院、医院、及び自宅療養時の種々の医療現場において、患者を、共通の生体信号をもとに治療し、療養することにより見守ることができる見守りシステムを提供する。【解決手段】利用者の生体情報を検出し、更に、環境の照度及び騒音を検出する。そして、照度及び騒音に基づき、前記生体情報の正確性を判定し、前記生体情報が正確であるときに、前記生体情報を使用して異常判定を行い、前記生体情報が正確でないときに、前記生体情報を前記照度及び騒音に基づき修正した生体情報を使用して異常判定を行う。このとき、第１利用者の生体情報が所望の数だけ前記記憶部に蓄積されたとき、機械学習を用いて、前記第１基準を調整した第２基準を算出し、前記第１利用者の生体情報又は修正された生体情報と前記第２基準に基づいて、前記第１利用者の異常を判定する。【選択図】図２
