To evaluate the efficiency of a vehicle carrying and high supporting optic-electronic detecting system in its design phase exactly,a method for synthesizing parameters from an optic-electronic subsystem,a mast system and a vehicle system was proposed to analyze the combat efficiency of the detecting system.By taking the expert giving cent as the main evaluating measure,a fuzzy synthetic evaluation project was introduced to evaluate the combat efficiency of the optic-electronic detecting system.This method was used to a vehicle carrying and high supporting optic-electronic detecting system,and the searching tracking and leading ability,system unstableness ability,system viability were evaluated.Obtained evaluation values are 79,85 and 87,and the collectivity efficiency is 82,which is identical with the actual evaluation of the system.The results can prove that the proposed project is more scientific and can be extended to other efficiency evaluation of optic-electronic systems.