Domestic bombers have not been equipped with the electro optical targeting system(EOTS),that makes them not be able to observe targets at night,and precise bombing cannot be realized as the current bombing targeting systems are the all optic targeting systems,so the EOTS is needed.According to the technology status of domestic electro optical turret,a turret system that integrates thermal imager,visible light camera and laser rangefinder was designed for achieving all weather air to ground precision attack.Through the calculation and simulation of operating range and stable precision,a design scheme of the optical interface board,stable platform and electronic control box uniform system was established,and simulation test and verification of stable precision have been done.Results show that precise air to ground all weather attack targeting can be realized by the designed electro optical turret system at night and complex weather conditions,which can get practical application in domestic bombers.