The embodiments of the present invention provide a bandwidth management device, central management device and method of bandwidth management. The bandwidth management device includes: a first receiver, configured to receive attribute information of media devices; wherein a criticality factor of media device is included in each piece of the attribute information; a second receiver, configured to receive media streaming from the media devices; a bandwidth assigner, configured to assign bandwidth for each piece of media streaming based on the criticality factor. Through the embodiments of the present invention, optimization of bandwidth usage is realized and it is easy to change the critical level of video streaming adaptively.