The invention relates to a method for obtaining performance parameters of a spectrum detection system after experiencing any moving period in a cognitive radio network, relating to the technical field of information and communication. The method disclosed by the invention aims to solve the problem that cooperation of single node and multiple nodes cannot be perceived in a mobile scene in the cognitive radio network in the existing method. The method disclosed by the invention comprises the following steps: obtaining a function relationship among the movement speed and the movement direction of a cognitive user, the distance between the starting point of a cognitive user in a current period and a main user and the distance between the end point of the cognitive user in the current period and the main user at first; then, acquiring a PDF of the distance between the main user and the movement end point of the cognitive user; obtaining a function relationship between main user signal power of a mobile user detected at the movement end point in the current moving period and the distance between the movement end point of the cognitive user in the current moving period and the main user so as to obtain a PDF of the power; and finally, acquiring single-node perception in the mobile scene and results of the detection probability, the false dismissal probability and the false alarm probability in hard-decision multi-node cooperative perception and soft-decision cooperative perception systems.