To improve the information safeguard capability of joint air-defense operation, a concept of joint air-defense battle-field information apperceiving system is proposed. The research way of the evaluation indexed system of the information apperceiving system is analyzed from the view of system construction, function and military requirements. Based on these, the principles of system effectiveness evaluation indexed system and the first level tactics indexes are brought forward. By adopting the Grey theory and adopting the grey synthesis judgment method, the effectiveness of information apperception system is evaluated, thus diminishing the influence of the ambiguous information during the evaluating process .These provide a reference to the joint air-defense battle-field information apperceiving system constructing and effectiveness evaluation.