Augmented reality (AR) three-dimensional (3D) display is a key technology for future"metaverse"scenarios. With the advantages of high transparency, true 3D, and natural interaction, AR-3D displays have great potential for innovative applications such as smart healthcare, smart culture and tourism, smart transportation, and intelligent manufacturing. This paper first reviews existing AR-3D display technologies. These technologies are then classified according to different 3D-display implementation methods, including stereoscopic, multi-plane, and light-field AR-3D displays. The development processes of various AR-3D display technologies are also described. Finally, the industrialization of AR-3D display technology in the context of future metaverse applications is analyzed. The rapid development of AR-3D displays is crucial for our country to gain competitive advantages in the novel display industry. This paper provides suggestions for the rapid development of this field.