There are 7 chapters in this book. Chapter 1 introduces the three-dimensional(3D)visual tracking problem for multicopters. Chapter 2 gives some preliminaries used in the book. Chapters 3~4 focus on the one-dimensional(1D) calibration problem for multiple perspective cameras and multiple fish-eye cameras. Chapters 5~6 deal with the robust pose estimation problem of multicopters in single-camera case and multi-camera case. Chapter 7 introduces a 3D visual tracking system for multicopters built with cheap and off-the-shelf cameras.This book is written for researchers and engineers working in robotic visual servo-ing, machine vision, systems and control, etc.