Based on phonon/photon energy band theory, artificial band-gap materials achieve novel physical effects and excellent properties beyond natural materials through artificial microstructure design and energy band regulation, which has become an important research direction of next-generation smart materials and digital materials. Our team has been committed to the design, preparation and application research of artificial microstructure materials, exploring the tailoring and regulation methods of phonon and photon band. Based on a series of new principles and effects such as "acoustic diode", "acoustic double negative refraction" and "optical one-way propagation", we are focusing on the theory, material and device research of "topological phonon" and "spin acoustics". The acoustic topological insulator materials and prototype devices have been realized in aeroacoustic, elastic wave, piezoelectro-acoustic surface wave and three-dimensional system,