In spite of the well-acknowledged environmental benefits of wind power generation, there is increasing concern upon impacts from wind turbines on local ecosystems and on the natural scenery. Wind power project impacts on environment mainly includes visual pollution （or natural scenery） , noise, avian safety and electromagnetic interference. The impacts on environment from a wind farm are great larger than that from a single wind turbine. Once a wind farm has been built up, the cost to eliminate or mitigate its negative influence would be enormous. Therefore, it is necessary to estimate various negative influences and take appropriate measures to reduce them planning and designing stage. to an acceptable level as early as possible in the