The fans have a common "Axial Fan", two kinds of nuclear centrifugal fan. In the form of so-called this fan, fan along the axial type fan product forward fanout wind, such as household electric fans and other so-called centrifugal fan, fan fanning out along the blade, through the housing channel output of wind. These two fans each have their own purpose, civil axial more, but now the country will also start using a large axial form in the industry, fans, in order to achieve energy saving effect. "Axial Fan" has been very widely used in power plants and in today's society. We can understand the measure "Axial Fan" works, impeller theory, structure type, performance parameters, performance curve, determine the knowledge and regulation aspects of operating conditions, and the experimental results are analyzed the characteristics of axial flow fan form work and adjustment method.