Firstly, some scientific knowledge should be popularized. Augmented Reality (abbreviated as AR in English) is a relatively new research field, which is a technology to enhance or expand the real world seen by users with additional information generated by computers. The augmented reality system uses additional graphics or text information to dynamically enhance the real scenes of the surrounding world. In the augmented reality environment, users can see the enhanced information generated by the computer while seeing the surrounding real environment. This enhanced information can be virtual objects coexisting with the real environment, or non-geometric information about the existing real objects.