We are pleased to present the proceedings of the 2nd International Conference on Smart City and Innovation that was held in Semarang, Indonesia, October 9, 2019 organized by Diponegoro University. This event is funded by the United States Agency for International Development (USAID) and the result of cooperation among six universities in Indonesia, namely the University of Indonesia, Diponegoro University, Padjajaran University, Sriwijaya University, Udayana University, and Sumbawa University of Technology that are involved in the project of Sustainable Higher Education Research Alliances (SHERA).The SHERA-SMART CITY (Scientific Modeling, Application, Research, and Training for City-centered Innovation and Technology) aims to enhance the quality and quantity of science and technology research in Indonesia’s higher institutions. Hence, this conference is organized to encourage the researchers to share their scientific works in response to urban challenges, including the adoption of sustainable energy for urban built environment and urban systems, as well as the provision of reliable urban mobility and sustainable water management.The proceeding presents the work of the academics around the world who research various topics of smart city discourse particularly related to the topics of energy-environment and infrastructure. This conference had received considerable attention from academics. A total of 132 abstracts and 83 full papers were submitted and followed a blind peer review process. There are 41 papers selected to be published in this proceeding. We like to take this opportunity to thank the reviewers who donated their time to ensure the quality of the papers.The Editor and the 2nd International Conference on Smart City and Innovation Committee expect that readers of this proceeding will find the research presented in this proceeding are interesting and encouraging future collaboration among the researchers.Best wishes,Maya Damayanti, Editor