The invention discloses an object recognition device and a method for a moving object. The device comprises a power supply module, a main control chip, a linearly-structured light projector, an industrial camera and a conveyor belt. The industrial camera is used for monitoring an object on the conveyor belt through the calibration of the camera, the calibration of a structured light plane and the motion estimation. In combination with the linearly-structured light projector, the main control chip automatically performs the three-dimensional reconstruction of the moving object, acquires the point-cloud information, and recognizes the three-dimensional attitude and the minimum bounding rectangle space of the object. Finally, through the template matching process, the object recognition is realized. The accuracy and the robustness of the object recognition are further improved.