The invention discloses a face identification method, a face identification device and a mobile terminal, and belongs to the field of identification of biological features. The face identification method comprises the following steps of acquiring a visible light face image set through a double-light-ray induction camera according to a preset acquisition rule; acquiring an infrared face image set through the double-light-ray induction camera according to the preset acquisition rule; judging whether a face template image matched with any one of face images in the visible light face image set and the infrared face image set exists on a home terminal; and when the face template image exists on the home terminal, passing through the face identification. According to the face identification method, due to the face identification by the double-light-ray induction camera, face image acquisition and face identification can be realized under different environment light ray conditions, and the accuracy of face identification is improved; and furthermore, the mobile terminal does not need to be provided with a plurality of cameras, so that the hardware space is saved, the performance-to-cost ratio is improved, and a user can carry and operate the mobile terminal conveniently.