There are many inadequacies in current video surveillance system, it’s not integrated with the SCADA system, and there are difficulties in the integration of different types of video devices into the substation monitoring system. The system adopts level distribution design, integrates video surveillance system and the SCADA system, builds unified application support platform for substation advanced application, implements sequential control technique based on video integration and intelligent analysis. The running state of primary equipment is analyzed by using a variety of video intelligent analysis algorithms, the system uses the analysis result as one of the criteria for the sequential control operation and realizes the multi-source confirmation of the sequential control result. The functions such as video integration, sequential control multi-source confirmation, video intelligent analysis, video joint and intelligent detection are expounded. The system developed has been successfully applied in the multiple smart substation.