"The Science of Brain Functions" is an international symposium organized by the State Key Laboratory of Brain and Cognitive Sciences and Faculty of Social Sciences of The University of Hong Kong. This symposium provides a valuable platform for scientists and scholars to conduct in-depth discussions on neuroscience and brain functions of human. To facilitate the knowledge exchange of brain research in cognitive and clinical areas, we are honored to have the academicians of Chinese Academy of Sciences, renowned local and international speakers from China, Taiwan, Singapore, United States and United Kingdom to share their thoughts.