When traditional Bang-Bang control in optoelectronic equipment is used in fine position of double-targets, the system is difficult to be stabilized because of its amplifying coefficient in infinity. This paper analyzes shortages of the Bang-Bang control, and proposes a kind of variable structure control, namely the coarse tracking algorithm based on the Bang-Bang control. It uses Bang-Bang control in the coarse tracking and switches it into linear control in a small deviation range. In the linear control, the strategies of infrared first-order capturing and infrared second-order tracking are proposed depending on characteristics of different regulators, and switching guidelines for the Bang-Bang control and linear control, and the infrared first-order capturing and infrared second-order tracking are given. The experiments show the proposed method makes the photoelectric equipment spend around 2.3 s in 90° back and forth position, which is shorter nearly 1 s than that of traditional method. Meanwhile, the laser rangefinder gives the rate of three-dimensional information to be 0.45 Hz, and it improves the optoelectric countmeasuring ability of the system for double targets.