A method and server for blocking access of an unauthorized device in a wireless communication system are provided. The method of the server includes receiving a report in which at least one unauthorized equipment is detected from at least one sensor; determining the at least one sensor to allocate each of the detected at least one unauthorized equipment based on at least one of a number of the at least one unauthorized equipment and a number of channels allocated to each of the at least one sensor; and requesting access blocking of the at least one unauthorized equipment allocated to a corresponding at least one sensor to the determined at least one sensor.