A service processing server for providing a communication processing service with an information providing server, to a cell phone belonging to a network capable of identifying subordinate cell phones, and including an application receiving part for receiving first communication terminal-specific information to specify a specific cell phone, and service-specific information in association with each other; a specific information generating part for generating second communication terminal-specific information; an approval requesting part for transmitting approval request information containing the service-specific information and the second communication terminal-specific information, to the information providing server; a result receiving part for receiving approval result information returned; and a registering part for performing a registration process for providing the communication processing service to the specific cell phone in accordance with reception of the approval result information.