The 2017 International Conference on Life System Modeling and Simulation (LSMS2017) and 2017 International Conference on Intelligent Computing for Sustainable Energy and Environment (ICSEE2017) aim to bring together researchers and practitioners in the field of life system modeling and simulation as well as intelligent computing theory and methodology with applications to sustainable energy and environment across the world. These events are built upon the success of previous LSMS conferences held in Shanghai and Wuxi in 2004, 2007, 2010 and 2014, and ICSEE conferences held in Shanghai and Wuxi in 2010 and 2014 respectively, and are based on large-scale UK-China collaboration projects on sustainable energy. At LSMS2017 and ICSEE2017, technical exchanges within the research community will take in the form of keynote speeches, panel discussions, special sessions, as well as oral and poster presentations. Participants will be treated to a series of social functions, receptions and networking sessions, which will serve to establish new connections, foster friendships, and forge collaborations. The conference in particular welcomes proposals of special sessions related to the key themes of the conferences and the workshops. http://www.lsms-icsee.shu.edu.cn/2017/cfp/