Aiming at the illegibility and relativity of the equipment maintenance support system, chooses the fuzzy comprehensive method. Based on the ability of what the system should be possessed when completing the equipment maintenance support task, builds up the efficiency evaluating indicator system of equipment maintenance support, evaluates the monomial index by using the expert mark method, gets the subjection coefficient between the object and comment by using the step by step method, assesses the grade according to the maximal subjection coefficient principle and finally the rational result is gained from the example. The approach of this evaluation method is distinct and the calculation is very convenient. It can provide a new method for the evaluation system standardization of the equipment maintenance support system.