The invention relates to a method for intelligently modifying a wind speed and power curve of a wind turbine generator. The method includes the following steps of obtaining running data of the actual wind speed and actual power of the wind turbine generator, establishing a Bean interval wind speed and power value relation, obtaining a wind speed and power polynomial of the wind turbine generator, and modifying the coefficient of the wind speed and power polynomial. By means of the method, the wind speed and power characteristic of the wind turbine generator can be truly and accurately reflected, the wind turbine generator can be more accurately controlled, and the wind speed and power curve of the wind turbine generators of various types and capacity levels can be modified.