Abstract: Based on the related theory of comprehensive ability of voluntary service organizations,to build tentative index groups of service condition,content and effect as the basic structure.By using two rounds of Delphi expert interview,this paper evaluates the effectiveness of index system,and forms 3first class indicators of service condition,content and effect,9second class indicators of human resource,material resource,information resource,business,public welfare activities,service object identity,volunteer identity,social identity and government evaluation,and 25 third class indicators,these indicators constitute the evaluation index system of mass volunteer service organization comprehensive ability.