Abstract: In order to improve the environmental worthiness of the shipborne electro-optical system, we analyzed the effect and hazard of the ship environment on the electrooptical system, conducted the research of environmental worthiness design, and suggested reinforcing and protecting all equipments. From the aspects such as material selection, optical system design,structure design and three-proofing, we gave some methods and measures for ameliorating the properties of anticorrosion, resistant to temperature change,shock and vibration. Through the experimentation and application in these years，the results show that we improve the protection ability of the equipment by using the material of good corrosion resistance,optimizing structure,and taking threeproofing measures;we reduce the annexable temperature rise whose maximum is 8.1 ℃ in the sun and improve the work environment of the electro-optical sensors；we ensure the infrared imaging quality because the maximum dispersion root-mean-square(RMS) radius is less than the pitch of the detector in -40 ℃～+60 ℃ with the mechanical compensation method;we improve the radial rigidity more than 25.9% and realize the work stabilization of the system by installing the thrust bearing．