The invention discloses a wind turbine generator system wind speed and direction measuring device and method. The problem that there is large error in wind speed and direction measurement in the priorart is solved. The device and the method can provide more timely and accurate wind speed and direction signals, make a wind turbine generator system respond quickly, and improve the generating capacity and operation stability of a wind turbine generator system. The scheme is as follows: the wind turbine generator system wind speed and direction measuring device includes a support tube, an anemoscope, an anemograph, and a lightning rod; the support tube is fixed to a wind deflector end cover of a wind turbine generator system and extends out of a wind deflector, and the support tube is connected with the hub of a wind wheel; the anemoscope and the anemograph are movably arranged on the support tube through a mounting base, transmit signals to a control unit, and are at a set distance fromthe end of the wind deflector; and the lightning rod is arranged at the front end of the support tube.