Renal pelvis cancer is the most common malignant tumor originating from the upper urinary tract epithelium. Since its treatment approach differs significantly from benign and malignant tumors of renal cell origin, accurate imaging diagnosis before treatment is extremely important. This review provides a comprehensive overview of the imaging methods for renal pelvis cancer, their advantages and limitations, CT/MRI imaging characteristics, and differential diagnosis from renal cell carcinoma and Renal infectious diseases. It also briefly introduces applications aimed at reducing radiation dose through split contrast agent injection, dual-energy CT utilization, and artificial intelligence applications designed to improve image quality and predict tumor response to treatment. The aim is to provide strategies for selecting appropriate imaging methods in clinical practice, improve the diagnostic accuracy of imaging for this disease, and learn about future trends in imaging advancements of this disease.