Video monitoring method and video monitoring system of direct-current power transmission system

The invention discloses a video monitoring method and a video monitoring system of a direct-current power transmission system. The video monitoring method comprises the steps that the inside and the periphery of a converter station are monitored by utilizing a converter station video monitoring system; grounding electrode video monitoring equipment is arranged at a grounding electrode of the converter station; the converter station video monitoring system is connected with the grounding electrode video monitoring equipment, so that video monitoring of the inside, the outside and the grounding electrode of the converter station is achieved; the grounding electrode video monitoring equipment acquires video information and transmits the video information to a mobile communication unit; the mobile communication unit transmits the received information to a remote server through a wireless communication public network and the Internet; and the converter station video monitoring system obtains the video information of the grounding electrode through access to the server. According to the method and the system, the grounding electrode is brought into a monitoring range of the converter station video monitoring system, and the method and the system have the benefits of comprehensiveness in monitoring, high efficiency, low cost, high reliability and the like.