2021 International Conference on Cloud Computer, IoT and Intelligence System (CCIIS2021) is rescheduled to be held virtual via Tencent Meeting due to Covid-19. CCIIS2021 aims to provide a premier interdisciplinary platform for researchers, practitioners and educators to present and discuss the most recent innovations, trends, and concerns as well as practical challenges encountered and solutions adopted in the fields of Cloud Computer, IoT and Intelligence System. Sincerely thanks for your paper submissions and support to CCIIS2021 conference.We, CCIIS2021 organizing committee, pay high attention to epidemic prevention and control under the general environment of normalized epidemic situation. We are committed to protecting the safety of all authors and attendees. CCIIS2021 is held virtual via Tencent Meeting on April 11, 2021, in which all interested attendee can choose to make presentation in this virtual form. In order to avoid the uncertainties of online meeting, including software operation and network stability, etc., our staff set the test room for attendees before formal opening for the keynote speaker and representatives to test their audio, video and check the stability of network connection state.CCIIS2021 virtual meeting mainly contain Keynote Speech, Oral Presentations, Q & A Sections and Poster Presentations. Dr. Hamed Taherdoost from Hamta Academy Research and Development Manager at OBS Tech Limited, Canada gave wonderful speech on Blockchain & Cyber Security from 09:20-10:10, April 11, 2021, even though there is 9-hour time difference. Prof. Ankush Ghosh from The Neotia University, India record his speech video about Artificial Intelligence for Future Generation Robotics. And the attendees made 10-20 mins oral presentations and poster presentations.Here are 78 paper submissions related to Cloud Computer, IoT and Intelligence System for peer reviewed by the Technical Program Committee. They established strict reviewing requirements and acceptance criteria. All paper submissions after removing authors’ information were assigned to 2-3 reviewers with similar research interests, and selected papers will be detected the instances of overlapping and similar text via iThenticate software. Plagiarism in any form is not allowed.We accept 30 papers eventually for publication in the Journal of Physics: Conference Series. Here are 3 main parts in CCIIS2021 proceedings according to professional guidance of Publication Chairs and the main aspects of papers including Cloud Computer, IoT and Intelligence System.Sincerest appreciation to all the active authors with innovative research findings, Journal of Physics: Conference Series with effective publication for excellent paper submissions, all the members and reviewers in CCIIS2021 Technical Program Committee with careful reviewing and overwhelming response. We truly hope you can enjoy the conference and benefit a lot from experience sharing and exchanging onsite. Sincerely looking forward for the future cooperation with you.CCIIS2021 Organization CommitteesGeneral ChairsProf. Igor Ivitskyi, National Technical University, UkraineProf. Ming An Chung, National Taipei University of Technology, TaiwanProf. Valentin Mateev, Technical University of Sofia, BulgariaPublication ChairsProf. Luís Manuel Cerqueira Barreto, Instituto Politécnico de Viana do Castelo (IPVC), PortugalProf. S. Balakrishnan, Sri Krishna College of Engg & Technology (Autonomous), InidaDr. S. PALANIVELRAJAN, M.Kumarasamy College of Engineering, IndiaPublication Co-ChairsDr. Hamed Taherdoost, OBS Tech Limited, CanadaProf. Seifedine Kadry, Noroff University College, NorwayInternational Scientific CommitteesDr. M. MADHIARASAN, Bharat Institute of Engineering and Technology, IndiaDr. Ivan Izonin, Lviv Polytechnic National University, UkraineProf. Shahram Babaie, Islamic Azad University, IranDr. Saša Ćuković, University of Kragujevac, SerbiaProf. Popa Ioan-Lucian, “1 Decembrie 1918” University of Alba Iulia, RomaniaDr. Elżbieta Macioszek, Silesian University of Technology, PolandDr. Ganesh S. kamble, Kolhapur Institute of Technology’s College of Engineering, IndiaProf. Vineet Jain, Mewat Engineering College, IndiaProf. Zhauyt Algazy, Almaty University of Power Engineering and Telecommunication, KazakhstanDr. Sumit Kushwaha, Kamla Nehru Institute of Technology, IndiaProf. Adnène Arbi, University of Carthage, TunisiaProf. Daniela LITAN, Hyperion University, RomaniaDr. Yasin POLAT, Nevsehir Haci Bektas Veli University, TurkeyProf. Gheorghe Grigoras, “Gheorghe Asachi” Technical University of Iasi, RomaniaDr. Mohamed El Amine SLIMANI, University of Science and Technology “USTHB”, AlgeriaProf. Jagdish Chandra Patni, School of Computer Science, University of Petroleum and Energy StudiesDehradun, IndiaProf. Davood Akbari, University of Zabol, IranProf. Paria Assari, Islamic Azad University, Hamedan, IranProf. Hasan AYDOGAN, Selcuk University, TurkeyDr. Mustafa Salam Kadhm, Imam Ja’afar Al-Sadiq University, IraqProf. Mark J. Jackson, Kansas State University, USADr. Mehdi Nazari Cheraghlou, Consultative Institute Tehran, IranProf. Shadi Abudalfa, University College of Applied Sciences, PalestineDr. Mustafa Salam, Imam Ja’afar Al-Sadiq University, IraqProf. Bogdan MOCAN, Technical University of Cluj-Napoca, RomaniaDr. Ha Huy Cuong Nguyen, Danang of University, VietnamDr. Ayush Dogra, CSIR-CSIO, Chandigarh, IndiaDr. Hugo Miguel A. L. F. da Silva, University of Minho, PortugalProf. Siddhartha Chatterjee, Gargi Memorial Institute of Technology, IndiaProf. Patrick S.P. Wang, Northeastern University, USADr. Isidoros Perikos, University of Patras, GreeceProf. Taher Rajab Kaddar, Damascus University, Syrian Arab RepublicProf. Loai Aljerf, Damascus University, SyriaProf. Wei Xie, Institute of Disaster Prevention, ChinaProf. Dariusz Jacek Jakóbczak, University of Gdansk, PolandDr. Karlos Stamatis, University of Patras, GreekProf. Giedre Streckiene, Vilnius Gediminas technical university, LithuaniaProf. Muhammad Ishaq, The University of Agriculture Peshawar, PakistanProf. Grigoras Gheorghe, The “Gheorghe Asachi” Technical University of Iasi, RomaniaProf. Andrés Honrubia-Escribano, University of Castilla-La Mancha, SpainDr. Razika Ihaddadene, Med Boudiaf University, Algeria Reviewer List Prof. Igor Ivitskyi, National Technical University, UkraineProf. Ming An Chung, National Taipei University of Technology, TaiwanProf. Valentin Mateev, Technical University of Sofia, BulgariaProf. Luís Manuel Cerqueira Barreto, Instituto Politécnico de Viana do Castelo (IPVC), PortugalProf. S. Balakrishnan, Sri Krishna College of Engg & Technology (Autonomous), InidaDr. S. PALANIVELRAJAN, M. Kumarasamy College of Engineering, IndiaDr. Hamed Taherdoost, OBS Tech Limited, CanadaProf. Seifedine Kadry, Noroff University College, NorwayDr. M. MADHIARASAN, Bharat Institute of Engineering and Technology, IndiaDr. Ivan Izonin, Lviv Polytechnic National University, UkraineProf. Shahram Babaie, Islamic Azad University, IranDr. Saša Ćuković, University of Kragujevac, SerbiaProf. Popa Ioan-Lucian, “1 Decembrie 1918” University of Alba Iulia, RomaniaDr. Elżbieta Macioszek, Silesian University of Technology, PolandDr. Ganesh S. kamble, Kolhapur Institute of Technology’s College of Engineering, IndiaProf. Vineet Jain, Mewat Engineering College, IndiaProf. Zhauyt Algazy, Almaty University of Power Engineering and Telecommunication, KazakhstanDr. Sumit Kushwaha, Kamla Nehru Institute of Technology, IndiaProf. Adnène Arbi, University of Carthage, TunisiaProf. Daniela LITAN, Hyperion University, RomaniaDr. Yasin POLAT, Nevsehir Haci Bektas Veli University, TurkeyProf. Gheorghe Grigoras, “Gheorghe Asachi” Technical University of Iasi, RomaniaDr. Mohamed El Amine SLIMANI, University of Science and Technology “USTHB”, AlgeriaProf. Jagdish Chandra Patni, School of Computer Science, University of Petroleum and EnergyStudies Dehradun, IndiaProf. Davood Akbari, University of Zabol, IranProf. Paria Assari, Islamic Azad University, Hamedan, IranProf. Hasan AYDOGAN, Selcuk University, TurkeyDr. Mustafa Salam Kadhm, Imam Ja’afar Al-Sadiq University, IraqProf. Mark J. Jackson, Kansas State University, USADr. Mehdi Nazari Cheraghlou, Consultative Institute Tehran, IranProf. Shadi Abudalfa, University College of Applied Sciences, PalestineDr. Mustafa Salam, Imam Ja’afar Al-Sadiq University, IraqProf. Bogdan MOCAN, Technical University of Cluj-Napoca, RomaniaDr. Ha Huy Cuong Nguyen, Danang of University, VietnamDr. Ayush Dogra, CSIR-CSIO, Chandigarh, IndiaDr. Hugo Miguel A. L. F. da Silva, University of Minho, PortugalProf. Siddhartha Chatterjee, Gargi Memorial Institute of Technology, IndiaProf. Patrick S.P. Wang, Northeastern University, USADr. Isidoros Perikos, University of Patras, GreeceProf. Taher Rajab Kaddar, Damascus University, Syrian Arab RepublicProf. Loai Aljerf, Damascus University, SyriaProf. Wei Xie, Institute of Disaster Prevention, ChinaProf. Dariusz Jacek Jakóbczak, University of Gdansk, PolandDr. Karlos Stamatis, University of Patras, GreekProf. Giedre Streckiene, Vilnius Gediminas technical university, LithuaniaProf. Muhammad Ishaq, The University of Agriculture Peshawar, PakistanProf. Grigoras Gheorghe, The “Gheorghe Asachi” Technical University of Iasi, RomaniaProf. Andrés Honrubia-Escribano, University of Castilla-La Mancha, SpainDr. Razika Ihaddadene, Med Boudiaf University, Algeria