In view of the lack of comprehensive and effective performance testing and simple and reliable evaluation methods for the two equipments in the smart substation, this paper lists some factors that affect the accurate evaluation of the two equipment performance in the Smart Substation, and compares the important characteristics of commonly used assessment methods, it is concluded that the fuzzy comprehensive evaluation method is more accurate for the secondary equipment of intelligent substation.The calculation steps are given, and the effectiveness and reliability of the method are verified by an example.