An intraoral scanning device includes: a housing having a projection port； a projection light source module disposed in the housing and located adjacent to the projection port for projecting light to an object, wherein light projected from the projection light source module projects light is projected to the object through the projection port； a reflection module, which is also disposed in the housing and arranged at an angle relative to the projection light source module for reflecting the light from the object； an image obtaining module, which is also disposed in the housing for detecting light from the reflection module and capturing at least one image corresponding to the object； and a processor, which is also disposed in the housing and is electrically connected to the image obtaining module to establish a three-dimensional model corresponding to the object according to the at least one image.一種口內掃描裝置包括：一殼體，具有一投射口；一投影光源模組，設置該殼體內，並位於該投射口附近，用以投射一光線至一物體，其中該投影光源模組所投射的光線是通過該投射口投射至該物體；一反射模組，也設置該殼體內，並與該投影光源模組呈一角度的相對設置，用以反射來自該物體之光線；一取像模組，也設置該殼體內，用以感測來自該反射模組之光線，進而擷取對應該物體的至少一影像；以及一處理器，也設置該殼體內，並電性連接於該取像模組，用以根據該至少一影像建立對應該物體的一立體模型。
