A call processing method, applied to a network device, wherein the method comprises: receiving a first call request message sent by an originating user equipment, UE, wherein the first call request message is used by the originating UE to initiate a call to a terminating UE, wherein the first call request message indicates that the originating UE supports a resource reservation procedure, and wherein the network device is configured as not supporting use of the resource reservation procedure for negotiation about first media and is configured as supporting use of the resource reservation procedure for negotiation about second media; sending a second call request message to a media server based on the first call request message, wherein the second call request message indicates that use of the resource reservation procedure for negotiation about the first media is not supported by the network device and use of the resource reservation procedure for negotiation about the second media is supported by the network device, the first media is call media to be transmitted between the originating UE and the terminating UE, and the second media is media to be played by the media server for the originating UE; receiving a first update message sent by the media server, wherein the first update message comprises SDP of audio/video that is of the media server and that is used for negotiation about the second media, and the first update message indicates that negotiation about the second media is performed through a resource reservation procedure and the first update message indicates that the media server has completed resource reservation for the second media; forwarding the first update message to the originating UE; and receiving a response message from the originating UE that corresponds to the first update message, response message includes SDP of audio/video of the originating UE and the response message indicates that the originating UE has completed resource reservation for the second media. receiving a first call request message sent by an originating user equipment, UE, wherein the first call request message is used by the originating UE to initiate a call to a terminating UE, wherein the first call request message indicates that the originating UE supports a resource reservation procedure, and wherein the network device is configured as not supporting use of the resource reservation procedure for negotiation about first media and is configured as supporting use of the resource reservation procedure for negotiation about second media; sending a second call request message to a media server based on the first call request message, wherein the second call request message indicates that use of the resource reservation procedure for negotiation about the first media is not supported by the network device and use of the resource reservation procedure for negotiation about the second media is supported by the network device, the first media is call media to be transmitted between the originating UE and the terminating UE, and the second media is media to be played by the media server for the originating UE; receiving a first update message sent by the media server, wherein the first update message comprises SDP of audio/video that is of the media server and that is used for negotiation about the second media, and the first update message indicates that negotiation about the second media is performed through a resource reservation procedure and the first update message indicates that the media server has completed resource reservation for the second media; forwarding the first update message to the originating UE; and receiving a response message from the originating UE that corresponds to the first update message, response message includes SDP of audio/video of the originating UE and the response message indicates that the originating UE has completed resource reservation for the second media.