A humanoid robot is designed to replicate human characteristics such as height, shape, behavior, language, and cognition, so that it can function in human environments, interact with humans in daily life, or even replace humans at work. Many humanoid robots have been created in the past few decades by worldwide research, with examples such as the Honda ASIMO, AIST HRP, Aldebaran Nao, and so on. Intelligent-humanoid robotics is a cutting-edge challenge that will continue to play a central role in robotics research and applications in the twenty-first century.