The present invention discloses one kind of human body orthopedic navigation system. The system has one computer with display and input terminal as the core, one CT or MR tomographic scanner connected to the I/O port of the computer, one C-arm or G-arm X ray unit, and one spatial servo location controller. The 2D images taken with the C-arm or G-arm X ray unit is first used in establishing virtual stereo operation scene, the 3D bone model established with CT or MR tomographic scanner before operation is then set into the established virtual stereo scene for registration to obtain position mapping relation between the 3D bone model and the 2D images, and the spatial servo location controller is finally computer controlled for orthopedic navigation. The system of the present invention has saving in apparatus investment and no strict requirement in the electromagnetic interference resisting capacity of the operation room. |