The invention relates to an external network video standard safety access gateway in an electric power system. The external network video standard safety access gateway in the electric power system comprises a unified electrical network video monitoring platform and is characterized by further comprising a video decoding server, a video coding server, a video control server and an individual isolation equipment, a user request of the unified electrical network video monitoring platform is received by the video control server, the user request is sent to video decoding equipment through the individual isolation equipment, decoding on data of external network video equipment is carried out by the video decoding equipment, coding is carried out by the video coding server, and the coded data is accessed to the unified electrical network video monitoring platform to realize a video monitoring function. The external network video standard safety access gateway in the electric power system can realize access of front-end equipment of an external network connection video monitoring system to achieve unified monitoring and unified management.