SWEDCS'2016 is the first gathering of world-class experts in computing systems, and is sponsored and organized by the School of Information Science and Technology (SIST) of ShanghaiTech University that is jointly founded by Shanghai Municipal Government and Chinese Academy of Sciences (CAS) in 2013. ShanghaiTech University is a small-scale research university that will lead the charge in China's higher education reform by becoming a top academic research institution that is home to world-class research laboratories and faculty members. This year, the workshop focuses on Energy-Efficient Computing. Today, energy-efficient computing is a key challenge for all modern computing devices and systems. This workshop gathers the most renowned researchers in the world to 1) discuss the state of the art and the future perspectives in the area of energy-efficient computing and 2) identify possible actions to develop the next-generation computing systems with orders of improvement in energy-efficiency. Related research areas include but are not limited to integrated circuits and systems (devices, circuits and architecture), software (OS and algorithms), applications (such as cyber-physical systems and Internet of Things) and neuromorphic computing.