Research Institute of Information Technology (RIIT), as part of the School of Information Science and Technology (SIST) of Tsinghua University and a division of Tsinghua National Laboratory for Information Science and Technology (TNLIST), is the major force and central base of Tsinghua University's research and development efforts in the area of information technology. Established in 2003, RIIT consists of eight technology R&D centers and multiple joint research labs cooperated with domestic and foreign Enterprises.

RIIT's mission is to target on world-class R&D objectives and standards, leverage on Tsinghua University's advanced research environment and recent technical innovations, cooperate with talented research teams in related academic departments, laboratories as well as industrial partners, and produce significant achievements to serve national interest and emerging information industries.