The embodiment of the invention provides a method and device for controlling a wind generating set to yaw. The method comprises the steps that the section wind directions and the section wind speeds of N different sections located in front of an impeller at different moments are measured; incoming flow equivalent processing is carried out on the measured section wind directions and the measured section wind speeds of different sections corresponding to different moments up to the current moment t, and the equivalent measurement wind direction theta t corresponding to the current moment t is generated; the wind generating set is controlled to yaw according to the equivalent measurement wind direction theta t corresponding to the current moment t. According to the technical scheme, it is achieved that the running wind generating set can actively yaw to be in the windward direction, and the accuracy of the yaw of the wind generating set is effectively improved.