Notebook computer is the epitome and extension of desktop PC, and it is also the inevitable product of users' higher demand for computer products. Its main advantages are small size, light weight, easy to carry, ultra-light and ultra-thin. The main development direction, its performance will be higher and higher, and its functions will be richer. Its portability and standby power supply make mobile office possible, so it is more and more respected by users and its market capacity is expanding rapidly.