In this paper, based on the geometrical optics principle of binocular imaging,we propose a binocular aiming system composed of dual cameras, which realizes the large-range and high-precision aiming of the laser beam on the charging target. By analyzing the positional relationship among the camera, the laser emitting port, and the charging target, large scale horizontal and vertical aiming as well as high-precision aiming has been realized theoretically and experimentally. The theoretical and experimental results show that when the focal length of the camera lens is 20 mm, the aiming error of each point is less than 1.6 mm on the 4 m×4 m plane 3 m away from the laser emission port; when the focal length of the camera lens is 50 mm, for the target 10 m away from the laser emission port in longitudinal area, the aiming error of the target does not exceed 2 mm. The system has the advantages of high aiming accuracy, simple device, and convenient operation, and it is an efficient and convenient aiming method that can be used in laser charging technology.