A method for controlling noise of a wind turbine, comprising: determining a noise-influencing sector of the wind turbine based on a position of the wind turbine and a position of a noise-influencing site; acquiring a current wind direction; determining whether the wind turbine under the current wind direction operates in the noise-influencing sector; limiting output power of the wind turbine, and increasing, after the wind turbine goes out from the noise-influencing sector and the output power reaches a rated power, the output power, in a case that the determination is positive; and continuing to acquire the current wind direction again, in a case that the determination is negative, wherein the noise-influencing sector is a sector region; a vertex of the sector region is the position of the wind turbine; and a central angle of the sector region has a predetermined angle, and an angular bisector of the central angle is in a direction from the wind turbine to the noise-influencing site, wherein increasing the output power comprises: operating the wind turbine in a power-boosted mode for power compensation, wherein: the impeller speed and/or the minimum pitch angle of the wind turbine is restored to a default value, and torque of a generator of the wind turbine is set within a range between a rated value for the torque and a preset value for the torque after the output power of the wind turbine reaches the rated power, and the preset value for the torque is greater than the rated value for the torque. determining a noise-influencing sector of the wind turbine based on a position of the wind turbine and a position of a noise-influencing site; acquiring a current wind direction; determining whether the wind turbine under the current wind direction operates in the noise-influencing sector; limiting output power of the wind turbine, and increasing, after the wind turbine goes out from the noise-influencing sector and the output power reaches a rated power, the output power, in a case that the determination is positive; and continuing to acquire the current wind direction again, in a case that the determination is negative, wherein the noise-influencing sector is a sector region; a vertex of the sector region is the position of the wind turbine; and a central angle of the sector region has a predetermined angle, and an angular bisector of the central angle is in a direction from the wind turbine to the noise-influencing site, wherein increasing the output power comprises: operating the wind turbine in a power-boosted mode for power compensation, wherein: the impeller speed and/or the minimum pitch angle of the wind turbine is restored to a default value, and torque of a generator of the wind turbine is set within a range between a rated value for the torque and a preset value for the torque after the output power of the wind turbine reaches the rated power, and the preset value for the torque is greater than the rated value for the torque. the impeller speed and/or the minimum pitch angle of the wind turbine is restored to a default value, and torque of a generator of the wind turbine is set within a range between a rated value for the torque and a preset value for the torque after the output power of the wind turbine reaches the rated power, and the preset value for the torque is greater than the rated value for the torque.