This book introduces methodologies to develop a variety of intelligent wearable interfaces and covers practical implementations of systems for real-life applications. A number of novel intelligent wearable interface systems are examined, including network architecture for wearable robots, wearable interface for automatic language translation, intelligent cap interface for wheelchair control, intelligent shoes for human-computer interface, fingertip human-computer interface, ubiquitous 3D digital writing instruments, and intelligent mobile human airbag systems.