Ultrafast laser has features of ultrafast speed, ultra-high intensity, and ultra-wide spectrum. Focused ultrafast laser can instantaneously generate extremely high temperature and pressure within transparent materials. Under such local extreme conditions, many new changes in the internal structures of the materials take place. Taking all-inorganic halide perovskite nanocrystals (PNCs) as an example, the basic principle of ultrafast laser-induced nucleation and nanocrystal precipitation in glass is expounded. Researches conducted in recent years on the precipitation of all-inorganic PNCs in glass by ultrafast laser are summarized, and the applications of this technology in the fields of optical storage and color display are analyzed.