Abstract: A network-wide service controller comprises a monitoring device, an intelligent device, and a management device. The monitoring device is configured to monitor a state of at least one network. The intelligent device is configured to determine a path within the at least one network according to the state of the at least one network. The intelligent device is further configured to receive an instruction from a user and convert the instruction into a lower-level instruction. The management device is configured to analyze the lower-level instruction from the intelligent device and control forwarding of packets according to a result of analysis of the lower-level instruction and the path determined by the intelligent device.