A needle-to-mesh electrode configuration method of an ionic wind generating module, wherein the ionic wind generating module comprises a metallic mesh and a plurality of emitter needles in an array disposed at one side of the metallic mesh , each emitter needle including a tip, the tips of the plurality of emitter needles being arranged in one plane, and wherein the metallic mesh is arranged so as to be parallel to the plane defined by the tips of the plurality of emitter needles, the method comprising: Step 1: ionic wind velocity test, which comprises: adjusting a distance between a single emitter needle and the metallic mesh to enable an ionic wind velocity at a corresponding air velocity central point on the metallic mesh to reach a maximum value under the premise that a voltage between the emitter needle and the metallic mesh is unchanged; measuring the adjusted distance L between the emitter needle and the metallic mesh as the ionic wind velocity at the corresponding air velocity central point is maintained at its maximum value V max , wherein the corresponding velocity central point is a projective area of a tip of the one emitter needle on the metallic mesh ; the method being characterized in that it further includes: Step 2: measurement of a radius of the projection area, which comprises: monitoring the ionic wind velocity V r at a velocity measuring point deviating from the velocity central point until V r = a V max ; measuring a distance r between the velocity measuring point and the velocity central point as V r = a V max , wherein a is a constant in a range from 0.3 to 0.7; Step 3: needle-to-mesh configuration, which comprises: setting the distance between the tip of the emitter needle and the metallic mesh in the range of 0.7 L to 1.3 L , and setting the distance between tips of any two adjacent emitter needles in the range of 0.7 r to 1.3 r , wherein in Step 3, the needle-to-mesh configuration further comprises: enabling the emitter needles to be parallel with each other, and enabling any three adjacent emitter needles to be configured in a layout of an equilateral triangle. Step 1: ionic wind velocity test, which comprises: adjusting a distance between a single emitter needle and the metallic mesh to enable an ionic wind velocity at a corresponding air velocity central point on the metallic mesh to reach a maximum value under the premise that a voltage between the emitter needle and the metallic mesh is unchanged; measuring the adjusted distance L between the emitter needle and the metallic mesh as the ionic wind velocity at the corresponding air velocity central point is maintained at its maximum value V max , wherein the corresponding velocity central point is a projective area of a tip of the one emitter needle on the metallic mesh ; Step 2: measurement of a radius of the projection area, which comprises: monitoring the ionic wind velocity V r at a velocity measuring point deviating from the velocity central point until V r = a V max ; measuring a distance r between the velocity measuring point and the velocity central point as V r = a V max , wherein a is a constant in a range from 0.3 to 0.7; Step 3: needle-to-mesh configuration, which comprises: setting the distance between the tip of the emitter needle and the metallic mesh in the range of 0.7 L to 1.3 L , and setting the distance between tips of any two adjacent emitter needles in the range of 0.7 r to 1.3 r , wherein in Step 3, the needle-to-mesh configuration further comprises: enabling the emitter needles to be parallel with each other, and enabling any three adjacent emitter needles to be configured in a layout of an equilateral triangle. <EOS>