Abstract: A method for paging a high-speed subscriber by a roaming reservation in a radio paging switching system. The method includes the steps of registering a roaming area and a scheduled arrival time through a voice mail system; converting a format of the registered information and transmitting the registered information to the radio paging switching system; transmitting the registered information to a radio paging terminal so that the radio paging switching system can synchronize with the radio paging terminal in an area, a time and a frequency; and checking a timer of a corresponding area, and if a registered time elapses, storing, in a data base, information that a subscriber moves into the corresponding area, thus to provide the subscriber with a roaming service.