Disclosed are a service processing method, a network controller and a forwarding device, wherein the method includes: after learning that a terminal leaves a network, a network controller acquiring information of a home forwarding device when the terminal leaves the network; the network controller determining a caching policy flow table, and sending the caching policy flow table to the home forwarding device. With the embodiment of the present document, in an IP network architecture in which control and forwarding are separated, after a WLAN terminal switches to a new radio access device, the service continuity can be maintained.