A multi-lens oral cavity observation system (100) is disclosed, comprising a housing (1), a power source (2), an illumination system (3), an observation system (4), an electric circuit system (5) and a switch (6). The observation system (100) comprises at least two cameras (41-2). The cameras (41-2) comprise a close focus lens (41-21) for observing an interior of an oral cavity and a camera (41-22) for capturing a face of a person. A lens switch (61) allows for switching between a working state of the close focus lens (41-21) and a working state of the camera (41-22) for photoing a face of a person, such that the multi-lens oral cavity observation system (100) can photograph an object at a far distance, such as a human face, as well as an interior of an oral cavity at a near distance, and store both an image of the human face and a morphology of the interior of the oral cavity in a display system (41-3) at the same time, thus effectively avoiding confusion of data collected from different subjects. An oral cavity observation system (100) with an identity recognition device is disclosed, comprising a housing (1), a power source (2), an illumination system (3), an observation system (4), an electric circuit system (5), a switch (6) and an identity recognition device (7). The observation system (4) comprises a camera (41-2) for observing, photographing or videoing an interior of an oral cavity. Data collected by the camera (41-2) is processed by a data processing system (41-1) and then transmitted to a display system for display and recording. The identity recognition device (7) can acquire an identity feature of a subject, such as a facial image, fingerprint, iris, etc., thus effectively avoiding confusion of data collected from different subjects.L'invention concerne un système d'observation de cavité buccale à plusieurs lentilles (100), comprenant un boîtier (1), une source d'alimentation (2), un système d'éclairage (3), un système d'observation (4), un système de c
