Ruling ability is an important issue,which the ruling party cannot disregard. The ethical appraisal criteria of ruling party’ ability consists of the legalism and support level of the ruling party’s political power,the stability and validity of the ruling party’s legal system,the maximized performance and reasonable cost of the ruling party’s administration. The ethical factors affecting the ability of ruling party include the social identity level of the ruling party’s ideology,the degree of interests integration,and the scientific level of performance in governance. It is necessary for the ruling party to strengthen the ruling ability by active promotion of the development of science and technology,enhancement of social fairness and justice,maintenance of social order and formation of the harmonious society according to the trend of development of economic society and the new anticipation of populace.