Abstract: The effectiveness evaluation index system of maintenance support system is established.Utilizing set pair analysis method,the multi-factorial evaluation model to assess the effectiveness of maintenance support system is established. Making a comprehensive evaluation of effectiveness by using quantitative result,and compared with the results of AHP and catastrophe evaluation,it is found that there is an accordant conclusion.It provides a new method for effectiveness evaluation of maintenance support system and provides quantitative gist for decision.

Key words: maintenance support system, effectiveness evaluation, set pair analysis