The invention discloses an oral cavity scanning system, an oral cavity scanning device and an oral cavity mirror group kit.The oral scanning device comprises an oral cavity mirror group kit and a device body.The oral cavity mirror group kit is detachably fixed on one end of the device body.The oral cavity mirror group kit comprises a shell, a first plane mirror, a second plane mirror and an image taking plane mirror.The first plane mirror and the second plane mirror are arranged in the shell face to face with each other.The image plane mirror is arranged on the inclined side of the shell body.The laser emitted by the body of the device enters the oral cavity mirror group kit, and after being reflected by the first plane mirror and the second plane mirror, it will shoot from the light outlet to the object (tooth) to be scanned.The angle between the mirror surface of the first plane mirror and that of the image taking plane mirror is between 120 and 170 degrees.The oral cavity mirror set has the advantages of small size.本創作揭露一種口腔掃描系統、口腔掃描裝置及口腔鏡組套件。口腔掃描裝置包含口腔鏡組套件及裝置機體。口腔鏡組套件可拆卸地固定設置於裝置機體的一端。口腔鏡組套件包含殼體、第一平面鏡、第二平面鏡及取像平面鏡。第一平面鏡及第二平面鏡彼此相面對地設置於殼體內。取像平面鏡設置於殼體內的斜側面。裝置機體所發出的雷射進入口腔鏡組套件內，並通過第一平面鏡及第二平面鏡的反射後，將由出光口射向待掃物體(牙齒)。第一平面鏡的鏡面與取像平面鏡的鏡面彼此間的夾角介於120～170度。本創作的口腔鏡組套件具有體積小的優點。
