According to an embodiment of the present invention, a freezer alarm system is provided. According to an embodiment of the present invention, a freezer alarm system comprises: a heat detection sensor placed inside a freezer and detecting human body heat; a control unit generating an alarm signal by determining whether there is a person through information of the human body heat measured from the heat detection sensor; an alarm unit provided with an alarm signal from the control unit to output an alarm and a warning light inside the freezer; and an inlet unit placed inside the freezer and providing an output stop signal which stops an output of the alarm and the warning light of the control unit.
