This book, with a focus on the establishment of urban public security risk prevention and control system, carries out a comprehensive review and a comparative study of its development. It provides a systematical analysis to the inevitable security issues in the process of urban development and conducts an in-depth discussion on the background of times featuring heightened security risks as well as the main sources of current urban public security risks. In addition to analyzing the inner structure and development motivations, this book further summarizes the inner mechanism for the effective operation of urban risk prevention and control system and elaborates on the reasons why grassroots governance plays a vital role throughout the whole process. Moreover, this book sheds some light on the future development of urban security risk prevention and control system. Centering on the frontiers of urban public security risk prevention and control, this book probes into the important issues in establishing an effective urban public security risk prevention and control system by combining theory and practice. As a result, it is highly recommended for scholars, government officials, and practitioners in the field of emergency management.