This course is directed against various kinds of materials mainly (The metal, ceramic, polymer, composite) Basic principle, Nature and application, do the outline introduction. The content includes the crystal structure of the material and crystal defect, the atom diffusion of the solid material, phase picture and phase change, the process and application of material, physical property of material (light nature, electric nature, magnetic quality and hot nature), mechanical nature of the material (The intensity, ductility, hardness, toughness, fatigue, creep), Strength mechanism and method of the material