A fiber laser precision cutting system was designed with allodial optics system and control software. The cutting system has many advantages such as high precision, high cutting speed, good stabilization and so on. With this system, the cutting experiments of stainless steel mobile telephone panel and leaking stannum board have been carried. The results indicate that there are many good characteristics, such as smoothness, uniformity, without residue and so on, through optimizing output power, frequency, pulse width, and assistant air pressure.