Abstract: Feasibility of adding a CCD camera to the gunner′s periscopic sight is analyzed. The principle and scheme of adding the CCD camera are brought forward in this paper. The requirement for keeping the periscopic height at the original point, changing the internal structure of the gunner′s periscopic sight as little as possible and reducing the cost of the whole project was met by selection of suitable mounting position and structure distribution of the CCD camera. The selection of CCD camera, the calculation of the beam path and the variation of laser emission path film are discussed by aid of relative theories. It is pointed out that the automatic video tracking can be realized if an automatic tracking assembly with the function of data processing is mounted on the system after the CCD camera is added to the gunner periscope, and the original observationaiming function in visible light is still retained. The whole research has significant value for improving fire control system function and tactics technique function of whole tanks.