This book focuses on the design and development of flight control for micro-small fixed-wing unmanned aerial vehicles (UAVs). The content is progressively deepened and closely linked to current engineering practices. By conducting an in-depth study of several key themes--such as UAV design, modeling, single-machine control and planning, swarm control and planning, and the development of visual perception algorithms--this book enables readers with no prior background to grasp advanced development techniques and keep pace with the forefront of technology. As such, it offers a valuable resource for anyone interested in micro-small fixed-wing UAVs, including students, teachers, researchers, and engineers.