The invention discloses an automatic teller
machine-based safe monitoring device, an automatic teller
machine-based safe monitoring method and an automatic teller
machine. The monitoring device is used for monitoring the automatic teller machine, is arranged between a
card reader and the automatic teller machine and comprises a card
control unit and a human face detecting unit, wherein the card
control unit is used for informing the human face detecting unit to start to detect when acquiring a data packet sent by the
card reader and resolving the acquired card
insertion information, and receiving the detection result from the human face detecting unit, if the detection result is that human face information is undetected, stopping the transaction at the time, and if the detection result isthat human face information is not detected, permitting the transaction at the time and forwarding the data packet sent by the
card reader to a host of the automatic teller machine; and the human face detecting unit is used for performing human
face detection on an image from an image taking device according to a received detection start notification and informing the card
control unit of the detection result. The device, the method and the automatic teller machine of the invention can prevent a masked criminal suspect from drawing money of a loser from the automatic teller machine (ATM).