The utility model provides an anti-mistaken-entry alarm device and system, and relates to the technical field of security and protection. The utility model provides a mistaken entry prevention alarm device and system. The system comprises an identity induction identification device, an alarm unit, a communication module and a plurality of identity identification cards, wherein the identity induction recognition device is electrically connected with the alarm unit; the alarm unit is electrically connected with the communication module; each identity identification card is provided with a code;the codes of the identity identification cards are different; codes of a plurality of identity identification cards are pre-stored in the identity induction identification device. The identity induction recognition device is used for recognizing the identity recognition card according to a pre-stored code of the identity recognition card; when the identity recognition card cannot be recognized, the alarm unit is controlled to give an alarm, and alarm information is sent to the terminal through the communication module, so that terminal management and control personnel are prevented from accessing in time, the management and control difficulty of field operation personnel is reduced, and the management and control reliability is ensured.