The invention discloses an RTMP cluster system dynamically-configurable method and device. The method comprises the following steps: detecting operating state information of each RTMP server in real time; when detecting that a source server has fault, selecting one of the residual edge servers to serve as a current source server; directing RTMP connection of the residual edge servers to the current source server; and enabling a user of the original source server having fault to re-establish RTMP connection with the existing server. Through the dynamically-configurable RTMP cluster, the problems that RTMP cluster hardware configuration cannot be adjusted dynamically, and dynamic switching cannot be carried out when fault occurs under a single source server are solved. In the large-scale use of enterprises, RTMP cluster system dynamically-configurable method and device do not need to construct a CDN, and can achieve a similar CDN distribution effect through a simple distributed deployment of several nodes, thereby greatly saving construction cost and reducing construction period.