Welcome to the 3rd Annual Applied Science and Engineering Conference (AASEC 2018). The conference will take place in Bandung, Indonesia, on 18 April 2018. It is hosted by the Technology and Vocational Education Study Program, School of Postgraduate, Universitas Pendidikan Indonesia (UPI) and UPI Publication Center, Universitas Pendidikan Indonesia (UPI) is jointly organized with Universitas Negeri Jakarta (UNJ), Environmental Engineering Universitas Trisakti, Universitas Syiah Kuala (UNSYIAH), Universitas Negeri Surabaya (UNESA), Politeknik Negeri Malang (POLINEMA), Sekolah Tinggi Teknologi Garut (STT Garut), Universitas Islam Negeri Sunan Gunung Djati Bandung (UIN SGD), Universitas Kanjuruhan Malang (UNIKAMA), Universitas Muhammadiyah Sidoarjo (UMSIDA), Universitas Wijaya Kusuma Surabaya (UWKS), and Universitas Warmadewa. As the theme of this year’s conference is “Ideas for Sustainable Green Energy”, this conference aims (1) to bring together the scientists, engineers, researchers and practitioners, students, and civil society organization representatives in the scientific forum; (2) to share and to discuss theoretical and practical knowledge about innovation in applied science and engineering. Specifically, this conference can be used as a scientific forum for accommodating discussion among young researchers that originated from Indonesia in the field of applied science and engineering. Therefore, the invited speakers in this conference are young researchers that are well-known and reputable in the world.