Computer-aided surgical navigation system, which is a combination of computer technology and medical imaging, is one of the most popular and developing fields in recent years. The navigation system is aimed to improve the accuracy and security of the surgery by pre-operative planning, intra-operative navigation and post-operative evaluation. This paper introduces the essential elements, fundamental principles, and implementation steps of the navigation system; further reviews its usefulness and progress in orbital fractures reduction, orbital tumor surgery and orbital decompression.