Laser based dynamic projection tracing sand plate system, and application of system

The invention relates to a laser based dynamic projection tracing sand plate system and application of the laser based dynamic projection tracing sand plate system; the laser based dynamic projection tracing sand plate system is characterized in that the system comprises a main controller, a laser positioning machine, a shaking projector, a projection screen and a tracing camera; the main controller is connected with both the shaking projector and the tracing camera; the shaking projector is directed at the projection screen, and the laser positioning machine is directed at the projection screen. The application comprises the steps: 1), positioning the projection place by the laser positioning machine; 2), using the shaking projector to project the digital content on the place positioned by the laser positioning machine; 3), judging whether the laser position is changed by the tracing camera, performing the step 4) if so, and keeping on performing the step 3) if not; and 4), adjusting the angle of the shaking projector and the place of the projected content according to the information fed back by the tracing camera, and then returning to the step 3). In comparison with the prior art, the system provided by the invention is flexible in operation and more humanized.