In the first part, the anatomy and surgical mark of the following structures were described respectively in detail: five portions of the temporal bone, external-media-internal ear, facial nerve in temporal bone, cerebellopontine angle and petrous apex. This is the basics of understanding the anatomic marks of normal radiological imaging and pathological-radiological imaging. In the second part, two-dimension CT imaging of temporal bone and the corresponding sectional anatomy of the same temporal bone were compared one by one on axial, coronal and sagittal view. Surgical and radiologic anatomic structures were marked in each section, their clinical significances were also explained in the meantime. In the third part, it covers 10 kinds of ear diseases using CT imaging in each part. It includes congenital malformation, trauma, inflammation, cholesteatoma. tumor and neighbor disease which affected the temporal bone, were described in detail respectively, some diseases attached MRI imaging and surgical findings. This may help for understanding radiological imaging and planning preoperative design. This book is useful for Otolaryngology & Head and Neck Surgery, Radiology doctors and related teaching personals.