The invention provides a video on demand method based on openflow control. The video on demand method based on the openflow control is applied to a video monitoring system based on an Openflow protocol. The video on demand method based on the openflow control comprises the steps that a network topology of a current system is obtained through an Openflow controller according to an Openflow protocol message and is reported to a video management server; the Openflow controller is noticed by the video management server to issue a flow table corresponding to a preset signaling message feature library to all network devices in the current system; when a video on demand service is initiated by a user, the video management server is in signaling message interaction with the user so that the flow features of the video on demand service can be obtained; a forwarding path of the video on demand service is judged by the video management server according to the access flow which can be borne by a physical link on the network topology and the obtained flow features of the video on demand service, and the video on demand service is forwarded according to the judged forwarding path under the guidance of the Openflow controller after the Openflow controller is informed. By the adoption of the video on demand method based on the openflow control, the utilization rate of an IP video monitoring network can be increased.