With the large-scale development of wind farms, its influence on climate is concerned. Since 2000, a few of studies have been carried out in countries such as the U.S. and Europe. China is still in the infancy, and the review of existing research can guide the further development of this work. The research progress, methods, influence mechanism and research results of impacts of wind farms on climate were summarized. A large number of observation and simulation results show that wind farms caused the rise of surface temperature and attenuation of downwind speed, it also affected precipitation, evaporation and other meteorological elements indirectly. The conclusion that wind farm has an influence on local climate change has reliability. Some model simulating results show that large-scale wind farm groups in the future may have an impact on global climate and further exploration is needed.