China is experiencing the most comprehensive and profound institutional change in the history of world social security. The 13th Five-Year Plan of the Central Committee of the Communist Party of China calls for a more equitable and sustainable social security system. That's giving us unlimited power to tell China's old-age story and welcome to the 19th National Congress of the Communist Party of China. In the light of the above considerations, this book was written. As the core content of social security, old-age security has always been the basic people livelihood project that the Communist Party of China and government attach great importance to, and is also the important administrative goal of building a moderately prosperous society. It is necessary to review the evolution of China's old-age security system, sum up the achievements and experience, and look into the development path of the old-age security with Chinese characteristics. This book, on the basis of systematically combing the course of China's old-age security system, summing up the achievements and experience, and putting the pulse of the status quo, actively explores the development path of the cause of old-age security with Chinese characteristics. This book analyzes the development and constraint conditions of the integration of basic old-age security in China from the four dimensions of economy, society, system and technology, this paper, and discusses the reform path and some concrete system integration and convergence of basic old-age security