Abstract: Since the mid of 20th century, Denmark and other Western countries have started the research of wind power forecast, from a single method to ensemble methods, while it started relatively late in our country.Over a very long period of time, the wind farms around the world have been using a single method to forecast wind power and have basically met the wind farm and the whole power system requirements.But, with the rapid development of wind power industry, the increasingly fierce market competition, the traditional single method wouldn't meet the needs of the future of wind power, while the ensemble forecast can solve this problem to a large extent.The accuracy rate of the traditional single method has reached a relatively high level and it is hard to getting higher level.Assembling the advantages of each method, the new way can greatly enhance the accuracy rate of prediction.This paper mainly focuses on the various traditional forecasting methods, which are expounded comprehensively.Combined with the analysis of experimental comparison of countries, the ensemble prediction is briefly explained.