Provided are a routing control method, device and system, which relate to the field of communications and can increase the flexibility and controllability of internetwork routing. The method comprises: a routing service policy proxy device (PP) sending a routing policy request to a network routing policy controller (PC); the device PP acquiring a routing service policy matching the routing policy request; and the device PP being deployed in a network autonomous system (AS) to which the device PP belongs and executing the routing service policy to forward data. The embodiments of the present invention are used for routing control between network autonomous systems (AS).