TJ YAG-505B 3D portrait laser subsurface engraving system consists of YAG-505B laser subsurface engraving machine and 3D camera. TJ YAG-505B laser subsurface engraving machine obtains the following characteristics: first, take a 3D photo of one or more persons with a 3D camera and process it in computer to form 3D portraits; second, utilizing laser focusing technology, it can engrave 3D everlasting portrait inside crystals. With the development of material life, people pay more attention to the pursuance of spiritual individuality. Therefore, with a broad market, the 3D subsurface engraved portraits are becoming more and more popular.