Message routing method, equipment and system

The invention discloses a method of message route, which is applied to the IP network controlling the SUA protocol of an adaptation layer for part of users based on signaling connection, the invention solves the problem of the message route that the device with more than two nodes can not correctly realize the SUA protocol when sharing a signaling point code. The method comprises that the following steps: the SUA message to be processed is obtained; the subsystem number of the route indicating information in the SUA protocol is determined not to be the subsystem number of the current node device; and the combination of the signaling point code corresponding to the current node device and arriving the next hop node device of the target node device and the subsystem number is determined according to the routing configuration information configured by the current node device, the SUA message is sent to the corresponding next hop node device according to the combination of the signaling point code of the next hop