Many new phenomena of the interaction between femtosecond laser and glass or crystal including photo-induced refractive index changes, photo induced reduction of rare-earth ion, photo induced micro-crystallization of glass, photo stimulated luminescence and long-lasting phosphorescence and so on were concluded. Meanwhile, the potential application was analyzed. In the end, the tendencies of the research of the interaction between femtosecond and other materials were discussed. And the new means that could be used when studying on femtosecond laser and crystals were indicated.