The invention discloses an implementation method for listening to messages. The implementation method comprises the following steps that (1) a Subscribe function of a terminal phone is started, and a Subscribe message is sent to an IP PBX voice system server; (2) after the IP PBX voice system server receives the Subscribe message sent by the terminal phone, a response message is sent to terminal equipment, a Notify message is sent to a terminal, a Message-Type and a Message-No head are added in the Notify message, so that the number of unread messages, the number of read messages, service types and service numbers corresponding to the service types are included in the Notify message sent to the terminal, and if the unread messages exist, a terminal message light is lightened; (3) if a terminal phone message light is lightened, a user only needs to press down an MWI button of the terminal phone, and a user can listen to the messages by dialing the service numbers of a transaction message according to the service types and the service numbers in the Notify message in the terminal equipment.