Objective To explore characteristics of the congenital cystic occupied lesions in parotid region found with the Ultrasound, CT and MRI, and to improve the knowledge and diagnostic skill about them. Methods Images findings of the Ultrasound, CT and MRI of the congenital cystic occupied lesions in parotid region of 33 cases proven on histological examination were reviewed retrospectively. Simple cyst in 5 cases, epidermoid cyst in 8 cases, branchial cyst in 9 cases, lymphangioma in 3 cases, and lymphoepithelial cyst in 8 cases were included. Results Most lesions were found as solitary, cystic and well-defined masses in parotid region in images of the Ultrasound, CT and MRI. Epidermoid cyst, branchial cyst, simple cyst and lymphoepithelial cyst showed regular shape, no blood supply and non-enhancing mass. But there were some suggestive imaging findings. Simple cyst presented with no echo. Capsule walls of the epidermoid cyst and branchial cyst were enhanced after contrast administration. Eepidermoid cyst were always superficial, and smaller than branchial cyst. Interface signs from different echo or intense signals are very suggestive of a branchial cyst. The echo/density/signal of the lymphoepithelial cyst were higher than that of the epidermoid cyst and branchial cyst. The lymphoepithelial cyst was found as polycystic-like in the CT. Lymphangioma showed as lobulated, creep growth, ill-defined and non-enhanced mass. Conclusion The location, shape, size, echo/ density/signal variation and the structure around about the lesion can be found in images of the Ultrasound, CT and MRI, and diagnosis of the congenital occupied lesions in parotid region could be improved combine with the imaging characteristics.