With the coming of artificial intelligence era, intelligent algorithms with autonomous learning and prediction ability extend from virtual space to real space. Algorithm is not only a specific technology, but also an important variable in the operation system of social power. Enterprises and organizations that grasp algorithms take technological advantages to control social information and resources and guide the government to form a quasipublic power of nonstate forces. Algorithmic power is a ubiquitous power relationship. Following the four rules of business logic, preference principle, technological rationality and implicit operation, it can influence the decisionmaking of public power. The lack of supervision of algorithmic power, excessive capitalization and black box dispelled political justice, resulted in institutional humiliation, and led to the crisis of rights protection. To prevent the alienation of algorithm power and establish an orderly network space, it is necessary to reduce capital dependence by state intervention, restrict algorithmic preferences by legal regulation, safeguard human value by algorithmic ethics, and manifest the operation of power by auditing and supervising so as to build a perfect algorithmic governance system to ensure social fairness and justice.