A wind turbine power generation facility comprising: a rotor including a wind turbine blade; a nacelle for rotatably supporting the rotor; a yaw driving part configured to rotate the nacelle; a pitch driving part configured to change a pitch angle of the wind turbine blade; and a controller configured to provide the pitch driving part with a pitch-angle command value to control the pitch driving part, wherein the controller includes: a demand-value calculation part configured to calculate a pitch-angle demand value on the basis of at least a rotation speed of the rotor; a limit-value setting part for setting a pitch angle between a full fine pitch angle and a full feather pitch angle as a limit value, if at least an angle between a wind direction and an orientation of the nacelle is not less than a threshold value A 1 (where A 1 > 0); and a command-value calculation part configured to set the limit value as the pitch-angle command value if the pitch-angle demand value is a value closer to the full fine pitch angle than the limit value is, and to set the pitch-angle demand value as the pitch-angle command value if the pitch-angle demand value is a value equal to the limit value or closer to the full feather pitch angle than the limit value is, wherein the limit-value setting part is configured to determine the limit value on the basis of the angle between the wind direction and the orientation of the nacelle, characterized in that the limit-value setting part is configured to, if the angle between the wind direction and the orientation of the nacelle is not less than a threshold value A 2 which is larger than the threshold value A 1, set the limit value closer to a feather side than a value at the time when the angle is at the threshold value A 1. a rotor including a wind turbine blade; a nacelle for rotatably supporting the rotor; a yaw driving part configured to rotate the nacelle; a pitch driving part configured to change a pitch angle of the wind turbine blade; and a controller configured to provide the pitch driving part with a pitch-angle command value to control the pitch driving part, wherein the controller includes: a demand-value calculation part configured to calculate a pitch-angle demand value on the basis of at least a rotation speed of the rotor; a limit-value setting part for setting a pitch angle between a full fine pitch angle and a full feather pitch angle as a limit value, if at least an angle between a wind direction and an orientation of the nacelle is not less than a threshold value A 1 (where A 1 > 0); and a command-value calculation part configured to set the limit value as the pitch-angle command value if the pitch-angle demand value is a value closer to the full fine pitch angle than the limit value is, and to set the pitch-angle demand value as the pitch-angle command value if the pitch-angle demand value is a value equal to the limit value or closer to the full feather pitch angle than the limit value is, a demand-value calculation part configured to calculate a pitch-angle demand value on the basis of at least a rotation speed of the rotor; a limit-value setting part for setting a pitch angle between a full fine pitch angle and a full feather pitch angle as a limit value, if at least an angle between a wind direction and an orientation of the nacelle is not less than a threshold value A 1 (where A 1 > 0); and a command-value calculation part configured to set the limit value as the pitch-angle command value if the pitch-angle demand value is a value closer to the full fine pitch angle than the limit value is, and to set the pitch-angle demand value as the pitch-angle command value if the pitch-angle demand value is a value equal to the limit value or closer to the full feather pitch angle than the limit value is,