Scanning two-dimensional code to show three-dimensional dinosaurs is the naked-eye 4D technology of ar interactive encyclopedia system. According to relevant information, there is naked-eye 4D technology of AR interactive encyclopedia system in the lobby on the first floor of Licang District Library (Jinyequan Road Hall), which was first introduced by county libraries in Shandong Province. Through naked-eye 4D technology, the stereoscopic image of dinosaurs can be framed with the real scene of human beings.