A method for controlling noise of a plurality of wind turbines, comprising: determining a noise-influencing sector of each of the plurality of wind turbines respectively, based on a position of each of the plurality of wind turbines and a position of a noise-influencing site; acquiring a current wind direction; determining whether there is at least one wind turbine of the plurality of wind turbines under the current wind direction operating in the noise-influencing sector of the at least one wind turbine; limiting output power of the at least one wind turbine, 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 output power of the at least one wind turbine reaches a rated power and is then increased after limiting the output power of the at least one wind turbine, or output power of another wind turbine of the plurality of wind turbines which is not limited reaches the rated power and is then increased while limiting the output power of the at least one wind turbine, so as to compensate a power loss in limiting the output power of the at least one wind turbine; and the noise-influencing site is a referential site affected by noise of the plurality of wind turbines; wherein the noise-influencing sector is a sector region (S1, S2); a vertex of the sector region (S1, S2) is the position of the wind turbines; and a central angle of the sector region (S1, S2) has a predetermined angle (θ 1, θ 2), and an angular bisector of the central angle is in a direction from the wind turbine to the noise-influencing site. determining a noise-influencing sector of each of the plurality of wind turbines respectively, based on a position of each of the plurality of wind turbines and a position of a noise-influencing site; acquiring a current wind direction; determining whether there is at least one wind turbine of the plurality of wind turbines under the current wind direction operating in the noise-influencing sector of the at least one wind turbine; limiting output power of the at least one wind turbine, 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 output power of the at least one wind turbine reaches a rated power and is then increased after limiting the output power of the at least one wind turbine, or output power of another wind turbine of the plurality of wind turbines which is not limited reaches the rated power and is then increased while limiting the output power of the at least one wind turbine, so as to compensate a power loss in limiting the output power of the at least one wind turbine; and the noise-influencing site is a referential site affected by noise of the plurality of wind turbines; wherein the noise-influencing sector is a sector region (S1, S2); a vertex of the sector region (S1, S2) is the position of the wind turbines; and a central angle of the sector region (S1, S2) has a predetermined angle (θ 1, θ 2), and an angular bisector of the central angle is in a direction from the wind turbine to the noise-influencing site.