The project directed by Prof. Chen Yaowu was awarded the National 2nd Prize of Sci & Tech Progress in 2010. With the support of National Research Plan (“973”. 863”. NSF and etc.), the project takes the lead in tackling the key technologies for large scale video surveillance system，and has made several breakthrough of some core techniques including adaptive scalable video coding, inter-current stream media error resilience, multi-source multi-scale indexing and virtual network storage, and finally a set of techniques and equipments with international level have been brought up. Up to the present, the system has been successfully applied to more than 200 Safety City Construction Projects which distributed in Shenzhen, Tianjin and etc., and played a great important role during these projects. Furthermore, the project has authorized 32 invention patents, acquired 13 software copyrights and has more than 20 papers index by SCI.