A method for playing media streams of a ring tone service based on Internet Protocol Television, comprising: receiving a notification message sent by a current originating network, wherein the notification message comprises user identity information of a first user and/or a second user, and identity information of media streams of a ring tone service; when a first user terminal calls a second user terminal, obtaining the identity information of the media streams of the ring tone service corresponding to the first user terminal and/or the second user terminal, wherein the obtaining corresponding identity information of the media streams of the ring tone service specifically comprises: parsing the notification message to obtain the identity information of the media streams of the ring tone service; characterized by further comprising: matching the user identity information of the first user and/or the second user with a mapping relationship between user identity information and IPTV service terminals, and extracting identity information of an IPTV service terminal matching the user identity information of the first user and/or second user and corresponding to the user identity information; and sending, according to the extracted identity information of the IPTV service terminal, the identity information of the media streams of the ring tone service to the Internet Protocol Television, IPTV, service terminal corresponding to the first user and/or the second user, so that the IPTV service terminal corresponding to the first user and/or the second user obtains and plays corresponding media streams of the ring tone service according to the identity information of the media streams of the ring tone service by sending a request message to a play function entity to request the play function entity to deliver corresponding media streams of the ring tone service; wherein the IPTV service terminal corresponding to the first user and/or the second user is a third terminal device other than the first user terminal and second user terminal. receiving a notification message sent by a current originating network, wherein the notification message comprises user identity information of a first user and/or a second user, and identity information of media streams of a ring tone service; when a first user terminal calls a second user terminal, obtaining the identity information of the media streams of the ring tone service corresponding to the first user terminal and/or the second user terminal, wherein the obtaining corresponding identity information of the media streams of the ring tone service specifically comprises: parsing the notification message to obtain the identity information of the media streams of the ring tone service; characterized by further comprising: matching the user identity information of the first user and/or the second user with a mapping relationship between user identity information and IPTV service terminals, and extracting identity information of an IPTV service terminal matching the user identity information of the first user and/or second user and corresponding to the user identity information; and sending, according to the extracted identity information of the IPTV service terminal, the identity information of the media streams of the ring tone service to the Internet Protocol Television, IPTV, service terminal corresponding to the first user and/or the second user, so that the IPTV service terminal corresponding to the first user and/or the second user obtains and plays corresponding media streams of the ring tone service according to the identity information of the media streams of the ring tone service by sending a request message to a play function entity to request the play function entity to deliver corresponding media streams of the ring tone service; wherein the IPTV service terminal corresponding to the first user and/or the second user is a third terminal device other than the first user terminal and second user terminal. matching the user identity information of the first user and/or the second user with a mapping relationship between user identity information and IPTV service terminals, and extracting identity information of an IPTV service terminal matching the user identity information of the first user and/or second user and corresponding to the user identity information; and sending, according to the extracted identity information of the IPTV service terminal, the identity information of the media streams of the ring tone service to the Internet Protocol Television, IPTV, service terminal corresponding to the first user and/or the second user, so that the IPTV service terminal corresponding to the first user and/or the second user obtains and plays corresponding media streams of the ring tone service according to the identity information of the media streams of the ring tone service by sending a request message to a play function entity to request the play function entity to deliver corresponding media streams of the ring tone service; wherein the IPTV service terminal corresponding to the first user and/or the second user is a third terminal device other than the first user terminal and second user terminal.