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 portraits inside big 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.