The International Workshop on Computer Science and Engineering 2009(WCSE 2009) and International Symposium on Intelligent Information Systems and Applications 2009 (IISA 2009)were held in Qingdao University of Science and Technology on 28-30 Oct., 2009. More than 160 experts and scholars from different countries and regions attend the symposium.The topic of the sessions are: Track on Journal of Software, Track on Journal of Computers, Track on Journal of Networks, Track on Journal of Multimedia, Track on Applied Cryptography, Track on Journal of Information Security, Track on Intelligent of Computing & Applications, Track on Multimedia Technology & Applications, Track on Information Processing Methods, Track on Software Engineering, Track on Poster of IISA 2009, Track on Poster of ISNNS 2009 etc.