A method, system, and apparatus for processing a service message with multiple terminals are disclosed. The method includes: receiving a request message from a terminal, where the request message carries request information of the terminal; and sending a service message to the terminal according to the request information. When a user has multiple terminals, the PPG selects a specific terminal for receiving an incoming service according to the SUBSCRIBE request of the terminal and the terminal request information carried in the SUBSCRIBE request. When a service arrives, the service message is sent to the selected terminal, thus avoiding sending of the service message to all terminals of the user.