This monograph（the Proceedings of the China Association for Science and Technology,V01.6）collects 24 selected Paners presented at the 11th Annual Conference of China Association for Science and Technology, Chongqing, September 7-10, 2009, and 57 selected papers published in Chinese journals sponsored by the member societies of the China Association for Science and Technology. These papers cover the following aspects: Agricultural Science,Chemistry and Chemical Engineering, Biology, Environmental Science and Technology, Medicine and Pharmacology, Safety Science and Technology, Mechanics,Forestry, Traffic Engineering,Physics,and Miscellaneous. Many novel research results on these fields achieved during the last few year sare mentioned in the Proceedings.