The virtual 4th International Conference of Agroindustry and Bioeconomy (ICGAB) 2020 has been successfully held and the IOP Conference Proceeding Series: Earth and Environmental Science has been completed. This year ICGAB is special, it is the first virtual conference organised due to the Covid-19 global pandemic which hit us in early 2020. The conference was held virtually because of the travel restriction and social distancing policy of the Republic of Indonesia Government. In order to maintain an academic atmosphere and keep providing an academic forum for the students, academicians, researchers, and professionals despite the pandemic condition, the committee decided to hold the conference virtually.The current ICGAB 2020 is organised by the Faculty of Agricultural Technology, Universitas Brawijaya (Malang, Indonesia) on the 25th of August 2020. The organiser collaborated with MSAE (Malaysian Society of Agriculture and Food Engineers), AUCFA (ASEAN Universities Consortium on Food and Agro-based Engineering & Technology), Forum Komunikasi Perguruan Tinggi Teknologi Pertanian Indonesia (FKPT-TPI), International Association of Agro-based Engineering and Technology (IAAET), and Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE) with the theme on “Emerging Technology and Integrated Information System for Sustainable Agroindustry”.This conference is aimed to communicate and disseminate research experiences, technology innovation, research and technology advances, as well as case studies related to sustainable agroindustry. This event provides a scientific platform enabling both local and international academia, researchers, policymakers, industry leaders, professionals, and other stakeholders to build networks, share ideas, and create research collaboration. The ICGAB 2020 is hopefully offering all participants to engage with the practices and/or implementation of advanced technology and information system to further develop the green economy in Indonesia through the creation of sustainable agroindustry.Since 2017, ICGAB has been successfully attracting more than 300 participants from different countries to each event. This year we proudly conducted the 4th ICGAB virtually. The conference consisted of the plenary and parallel sessions. The speakers and presenters came from six countries (Australia, Japan, South Korea, the Philippines, Malaysia and Indonesia). The virtual conference was held using the Zoom Meeting Platform. The conference organiser managed the conference from Malang, Indonesia, while the participants and speakers joined the conference virtually from their respective location in several cities in Indonesia and other countries (i.e. Malaysia, Philippines, Japan, Australia, and South Korea). The prominent resource persons invited as the keynote speakers were Rossana Marie Amongo, PhD (University of the Philippines Los Baños, Los Baños, the Phillipines), Ir. Mohd Fazly bin Mail P.Eng., M.I.E.M (Malaysian Agricultural Research and Development Institute, Malaysia), Assoc. Prof. Grause Guido (Tohoku University, Japan), Assoc. Prof. Yasmin Sultanbawa (The University of Queensland, Australia), and Prof. Teti Estiasih (Universitas Brawijaya, Indonesia).The parallel session of ICGAB 2020 was well attended with 13 (thirteen) topics covered; all presenters did an outstanding job of sharing their expertise and experiences, beneficial to support the creation of a circular economy in Indonesia. There 243 participants from 6 countries presented and discussed during the conferences. The parallel sessions were conducted in ten different Zoom conference rooms. Each room was led by a chairperson and co-chairperson. Each participant was given seven minutes to present the paper followed by a discussion session led by the chairperson. The parallel sessions run very well. The participants were actively engaged during the discussion sessions. The technical areas and applications covered by the proceedings, namely:1. Food Safety and Security2. Agricultural Engineering3. Agricultural Product Technology4. Agroindustrial Production System Management and Regulation5. Renewable Energy and Biorefinery6. Waste and Environmental Management7. Health, Nutrition and Medical Microbiology8. Industrial Biotechnology and Bioprocessing9. Food Microbiology10. Agro Forestry and Biodiversity11. Fisheries and Marine Resources Technology12. Animal Welfare and Technology13. Bioeconomy and BiobusinessDespite some minor limitations, thanks to the support of innovation and advancement of virtual technologies, it was possible for us to hold the conference on time and excellently.Among the presented papers, 191 manuscripts have been gone through the peer review process and 152 manuscripts have been accepted to be included in this IOP Conference Series: Earth and Environmental Science ICGAB 2020 Proceeding. Acknowledgment is due to all participants, reviewers, editors, committees and all who contributed to this event. We hope that this conference proceeding could contribute to the advancement of agricultural technology in the world. We also hope to see you at the 5th ICGAB 2021!CONFERENCE COMMITTEE, Scientific Committee, Steering Committee, Editors, ORGANIZER, SPONSOR and this titles are available in this pdf.