The invention discloses an attendance checking method based on a water purifier. The attendance checking method based on the water purifier comprises a controller, a memory, an
infrared temperature sensor, a first camera, a second camera, a
pressure sensor and an alarm, wherein the controller, the memory, the
infrared temperature sensor, the first camera and the second camera are arranged on the water purifier; the second camera is used for
infrared thermal imaging; the
pressure sensor and the alarm are arranged on a seat of a user; the controller is electrically connected with the infrared temperature sensor, the first camera, the second camera, the memory, a
server, the
pressure sensor and the alarm; when the user approaches the water purifier, the water purifier obtains a
human body signal detected by the infrared temperature sensor; the first camera and the second camera are used for collecting user images; a
database including feature point sets and key point sets of all users is arranged in the memory; and the controller identifies key points, identifies and matches matched feature points and finally identifies the user to perform attendance checking. The attendance checking method based on the water purifier, disclosed by the invention, has the advantages of high
identification rate, strong applicability and low cost and the management convenience is improved.