Non-intrusive terminal overcomes the problems of high cost, complex installation and inconvenient maintenance of the traditional intrusive terminal, and is widely used. However, the non intrusive terminal load identification ability is only evaluated by electricity index, and the evaluation system is single presenly. Therefore, multi-dimensional indicators are selected to comprehensively measure the terminal's ability to identify electrical loads, and a hierarchical multi group evaluation model of non-intrusive terminals is construct based on it. Entropy weight and analytic hierarchy process(AHP) combination evaluation technology is used to get the combination weight of indicators. On this basis, by using the grey technique for order preference by similarity to an ideal solution(TOPSIS) evaluation method, the electric appliance identification ability of the electric appliance combination cases are classified and sorted, so as to objectively obtain the overall identification ability level of the terminal and the quality of the terminal identification ability in different cases. Finally, four typical electrical appliances are selected from the non intrusive terminal demonstration platform of Jiangsu Electric Power Research Institute to verify that the scheme solves the problem of incomplete evaluation index data. Combined with the terminal identification ability verification of practical projects, the scientificity and effectiveness of the non-invasive load identification terminal identification ability evaluation are improved.