From 2005 to 2009, Professor Ren Lei studied at the Institute of software of the Chinese Academy of Sciences under the guidance of researcher Dai Guozhong, one of the famous pioneers in the field of computer graphics and CIMS computer integrated manufacturing in China. In 2009, after receiving the doctor's degree in computer application technology, he entered the Academician Li Bohu team of Beihang automation college. During this period, he had academic exchanges and visits in the United States, Canada, France, Italy, Australia, Singapore and other countries, At present, he is a professor of automation college, doctoral supervisor (pattern recognition and intelligent system direction), senior researcher of Engineering Research Center of Ministry of education for advanced manufacturing system of complex products, Secretary of system simulation and intelligent manufacturing department, deputy director of intelligent manufacturing and simulation technology laboratory, and deputy director of cloud manufacturing research center. Research interests include new generation artificial intelligence and big data, industrial Internet and industrial software, cloud manufacturing and intelligent manufacturing.

As the Principal Investigator, he presided over more than 20 national key R & D plans, including key projects of cloud computing big data / network collaborative manufacturing and intelligent factory, key projects of NSFC, major special projects of national industrial Internet, general projects / youth projects of NSFC and sub projects of national 863 project, As the main backbone, he has participated in more than 20 national projects such as scientific and technological innovation 2030 - new generation artificial intelligence, national key R & D plan, 863, 973 and natural science foundation. In addition, he also participated in major strategic consulting projects of the Chinese Academy of engineering such as "Research on the development strategy of China's artificial intelligence 2.0" and projects of China Aerospace Science and Industry Corporation. He has published more than 100 SCI / EI papers in IEEE TII, tnnls, tase, tnse, iot-j and other international well-known journals and conferences, including 7 papers highly cited by ESI, 8 papers with impact factors greater than 10, cited by Google Scholar more than 5000 times and SCI nearly 2000 times, which have been positively evaluated by more than 50 international well-known fellows or academicians. The paper achievements related to big data won the top academic paper award of China's high-quality science and technology journals. Taking China's large manufacturing enterprises as the application background, he has led the research and development of more than 20 industrial software systems and applied for more than 50 patents and software copyrights. Won the first prize and second prize at the provincial and ministerial level. The transformation of industrial Internet core technology achievements has been applied to many national industrial Internet platforms such as CAOS, aerospace cloud network and Inspur, as well as large manufacturing enterprises such as aerospace science and industry, COMAC, CRRC, Liugong, Haier and Lenovo, with an economic benefit of more than 1 billion.

Served as the expert of national key R & D plan, National Natural Science Foundation of China, industrial Internet project, etc. He has participated in the major research plan of "basic theory and key technology of future industrial Internet" of NSFC, the major project of scientific and technological innovation 2030 - "new generation artificial intelligence" and "intelligent manufacturing", the key special projects of "network collaborative manufacturing and intelligent factory" and "industrial software" of national key R & D plan Planning and suggestions for major science and technology projects such as the national industrial Internet project. Served as the chairman of more than 10 international conferences or forums such as IEEE cpscom, was invited to make more than 10 conference reports at home and abroad, served as a member of the expert committee or professional technical committee of more than 10 domestic / international academic organizations such as IEEE, CCF, CAAI, CAA and CSF, served as the editorial board of the Journal of the international society of modeling and simulation and the reviewer of about 40 international and domestic well-known journals, Member of the jury of the first China Industrial Internet competition, vice chairman of the talent group of China Industrial Internet industry alliance, and member of the steering committee of yunbian collaborative industry array.

At present, he is one of the core backbones of Academician Li Bohu's team. The team creatively put forward the concept, mode and technical system of "cloud manufacturing" in the world. As a new model pioneered by China, cloud manufacturing has led tracking research in dozens of countries in Europe and the United States. Cloud manufacturing has become an important part of "industry 4.0" and "made in China 2025", and has incubated the world's first batch of industrial Internet platform companies such as "aerospace cloud network". He once served as the director of the overall group and chief scientist assistant of the National 863 major theme project "key technologies and applications of cloud manufacturing service platform". He is one of the core contributors to the first theoretical technology system, the first prototype system and the first national standard in the field of cloud manufacturing.

As an undergraduate tutor, he has guided undergraduates to undertake more than 10 national innovation projects and Beijing entrepreneurship support projects. Most of the undergraduates under his guidance are recommended to Tsinghua University or well-known universities in the United States and Europe for further study. As a tutor of postgraduates, master / doctoral students have won many Postgraduates' academic excellence funds, innovation funds, national scholarships, President scholarships, top ten postgraduates and the best Thesis Award of international conferences. Doctoral graduates stay in school to teach or go abroad for further study. Postgraduates mainly work in large central enterprises such as China aerospace, China Shipbuilding and the head office of the central bank Bat and other large Internet companies, or recommended to MIT and other famous universities in Europe and America for further study.