This book provides a comprehensive and systematic review of China's rule of law on cybersecurity over the past 40 years, from which readers can have a comprehensive view of the development of China's cybersecurity legislation, supervision, and justice in the long course of 40 years. In particular, this book combines the development node of China's reform and opening up with the construction of the rule of law for cybersecurity, greatly expanding the vision of tracing the origin and pursuing the source, and also making the study of the rule of law for China's cybersecurity closer to the development facts of the technological approach.