The invention discloses a semiconductor structure and a method for operating the same. The semiconductor structure comprises a substrate, a first doping area, a second doping area, a third doping area, a first channel structure and a second grid structure, wherein the first doping area is positioned in the substrate and has a first conduction type; the second doping area is positioned in the first doping area and has a second conduction type opposite to the first conduction type; the third doping area is positioned in the second doping area and has the first conduction type; the first channel structure is provided with a first grid structure; and the first grid structure and the second grid structure are respectively positioned on different sides of the second doping area.