2021 Research, Invention, and Innovation Congress (RI2C2021) hosted by King Mongkut’s University of Technology North Bangkok (KMUTNB). Our president, Prof. Dr. -Ing. habil. Suchart Siengchin, and conference committees would like to kick up this conference as a flagship of university history and aim to continue this conference in the future. In this conference, we would like to invite KMUTNB’s collaborators worldwide to attend RI2C2021 to exchange their experiences and re-vow our relationship in academic and research affairs.