The 6th KKU International Engineering Conference 2020 (KKU-IENC 2016) was successfully held on August 3-5, 2016 at Pullman Khon Kaen Raja Orchid Hotel, Khon Kaen, Thailand. Two keynote lectures, 17 invited speakers, 203 oral presentations, 39 poster presentations were featured and more than 300 participants from 10 countries joined the conference. All accepted and presented papers were distributed to four prestigious publication sources, including three SCOPUS indexed journals (Key Engineering Materials, Chiang Mai University Journal of Natural Sciences, and International Journal of Technology) and a journal in the Thai-journal Citation Index (TCI) which is the KKU Engineering Journal (the former name of Engineering and Applied Science Research journal).