Abstract: The technical level, architecture and reliability of computer supervisory control system and control & protection system are closely related to the safe and economic operation of UPFC. The architecture of the computer supervisory control system and control & protection system of Shanghai Yunzaobang UPFC project is developed from conventional AC substations based on the experience of smart substations, and consists of equipment, network architecture and communication protocol, etc. It is not only as cheap and reliable as conventional substation supervisory control system, but also compatible with electronic transformer, and can realize the power flow control and self-protection functions of UPFC. The architecture, sequential control operation, and operation experience of Yunzaobang UPFC project supervisory control system are of demonstration value to the implementation of other UPFC or FACTS projects.