TWI798042B

A freezer environment sensing device used to perform a freezer environment sensing method. The method includes: sending, by a Doppler transceiver unit, a test wave inside a freezer and receiving a reflected wave formed by reflections of the test wave; and comparing, by a processing unit, the test wave and the reflected wave. When the test wave and the reflected wave are inconsistent, the processing unit controls a gate of the freezer to open, and controls a movable end of a mobile unit to drive an image capture unit extend into the freezer from the gate. The processing unit then controls the image capture unit to obtain an image inside the freezer. The processing unit then transmits the image to an artificial intelligence image recognition model which can recognize a human body from the image. Accordingly, the invention can effectively prevents an employee from being trapped in the freezer.