The invention relates to a direct current power transmission monitoring system and a disaster recovery realization method. The method determines whether fault occurs to a main server in real time, and if a fault occurs, then, a disaster recovery server is initiated; otherwise, the disaster recovery server is prohibited for use. The disaster recovery server is a server that is accessed to a normally running network together with the main server and shares the same network address as the normally running network. According to the invention, under the condition that the currently available control and protection system host machine, the applications at a client terminal and the configuration thereof are not changed, the disaster recovery server is accessed to a network to obtain services or data directly so as to ensure the usability and the reliable operation of an entire system and to solve the problems that when a disaster recovery server is added into a monitoring system already put into operation, software at the client terminal needs to be re-configured and that the large amount of workload leads to errors.