The book explores the fault-tolerant control (FTC) methods for unmanned flight vehicle (UFV) by considering practical safety issues in low-altitude economic environments. It provides systematic and comprehensive descriptions of practical FTC issues of UFV in low-altitude economic environments, such as highly demanded performance constraints requirements in the presence of faults and disturbances, communication constraints including limited bandwidth and time-delay among numerous UFV, composite actuator-sensor faults in complex flight scenario, wake vortex encountered by the trailing UFV in close formation flight. To effectively address these practical safety issues for UFV in low-altitude economic environments, enhanced FTC strategies are artfully presented to improve the flight safety. Thus, UFVs can be used to execute tasks with a high safety level in the complex low-altitude economic environment. As such, the book offers readers an in-depth understanding of UFV in low-altitude economic environments and corresponding safe control design methods. The FTC methods presented here can also provide guidelines for engineers to improve the safety of aerospace engineering systems for promoting the development of low-altitude economy. The book offers a valuable asset for scientists and researchers, aerospace engineers, control engineers, lecturers and teachers, and graduates and undergraduates in the system and control community, especially those working in the field of UFV and low-altitude economic industry.