The invention discloses a method for establishing a forwarding path for service flow, which comprises the steps of: determining at least one target network controller, wherein each of the at least onetarget network controller establishes the forwarding path in a network corresponding to each target network controller for transmitting service flow, and the service flow is service flow transmittedbetween an application of a client and an application of a server; and sending a Qos (Quality of service) parameter required for transmitting the service flow to each of the at least one target network controller, so that each target network controller establishes the forwarding path for the service flow, which meets the Qos parameter required for transmitting the service flow. By sending the Qosparameter required for transmitting the service flow to each target network controller between the client and the server, the target network controller can establish the forwarding path for the service flow, which meets the Qos parameter.