The book introduces the using of navigation assisted robotic system in orthopedic surgery. The system is based on real-time 3D navigation. In the first part, it covers spine surgery, which includes pedicle screw fixation on cervical, thoracic, lumbar spine, dens screw fixation, Margerl screw fixation, PVP, PKP, and MED. The second part is about trauma surgery, which covers screw fixation in pelvis fracture and acetabulum fracture. This book is mainly written for spine surgeons, neurosurgeons, and traumatic orthopedic surgeons.