The video player of the city monitoring networking platform is researched, and a new multi-function video player is presented through analyzing the advantages and disadvantages of the existing video players. This player is a mode of Internet-based B/S video player which bases on VLC architecture, and is achieved by combining C# ActiveX control technology with streaming media technology. The practice proves that this video player greatly improves the efficiency of security, and reduces the waste of manpower, with better use value and application prospects.