From the "Micro Cooling Fan" axial fan demand characteristics prediction for the use of enormous quantity of small and medium sized wind turbine, the product structure and manufacturing process is relatively simple, the cost is low, users are mainly the pursuit of high efficiency, low noise, long life, and the price is cheap. Another is the capital and technology intensive, "Micro Cooling Fan" complex structure, long manufacturing cycle, complete and systematic also strong, but runs at high pressure, high temperature and high speed conditions, and some even run in harsh conditions the user of the class "Micro Cooling Fan" have different requirements. Turbine blowers and compressors and large fan, users are mainly the pursuit of high quality, high reliability, smooth operation and long life cycle.