The invention discloses a face-recognition-based entrance guard attendance system which comprises a central controller, a face recognition unit, a classification unit, a storage device, a communication device, an alarm device, an electromagnetic door controller and an attendance terminal, wherein the face recognition unit, the classification unit, the storage device, the communication device, the alarm device, the electromagnetic door controller and the attendance terminal are connected with the central controller; the face recognition unit comprises a camera, a basic database and a comparator; the communication unit comprises wifi transmission and GSM transmission; and the attendance terminal is arranged on a mobile phone of a manager. The entrance guard system and the attendance system are integrated into a whole, the system is convenient and rapid, the cost is saved, the attendance system can automatically classify according to departments to which personnel belong, and transmit the attendance information to the managers in each department in real time, the attendance terminal can be arranged on the mobile phone by the managers, and the management is convenient.