On behalf of the Organizing Committee, it is our great pleasure to invite you to The 19th Asia Pacific Symposium on Intelligent and Evolutionary Systems (IES 2015) to be held in Bangkok from 22-25th November 2015. IES 2015 aims to bring together researchers from countries of the Asian Pacific Rim in the fields of intelligent systems and evolutionary computation to exchange ideas, present recent results and discuss possible collaborations. Researchers from elsewhere interested in collaboration with researchers from Asian Pacific Rim are also most welcome. The theme for IES2015 is Transforming Big Data into Knowledge and Technological Breakthroughs ”. IES2015 will include the latest relevant as well as related topics in the field.