The embodiment of the invention provides a topology change (TC) message forwarding method, device and system. The method comprises steps that a first forwarding device, via a first port, receives first information transmitted by a second forwarding device through a root port; the first forwarding device, via a second port, receives second information transmitted by the second forwarding device through a substitute port; the first forwarding device determines to forward a topology change message to another forwarding device in the same ring network according to the first information and the second information. Thus, the TC messages are forwarded only within the same ring network; relearning of the MAC addresses of all forwarding devices in the entire network is avoided; and the load of some forwarding devices in the entire network is reduced.