The urinary system consists of the organ responsible for making and removing urine from the body; kidney, ureter, bladder and urethra. To show pathology and anomalies, it is necessary to use a series of radiological examinations, starting from conventional to the most modern methods. For the highest quality display, an ionic contrast agent is applied, except for unenhanced image, which begins conventional radiological processing. After contrast application, excretory or intravenous urography and antegrade and retrograde urography are performed to show the upper urinary tract. Cystography are used to show the lower part of the urinary system and for urinary cystourethrography and urethrocystography. Modern methods include CT, MR and ultrasound, and DSA as an invasive method, MRA and CTA as noninvasive methods to show renal vessels. IVU is a method of high diagnostic points for the detection of kidney stones, tumors and cause of hematuria as the most common indications for performing urography. It is a 2D method that determines the appearance and partially function of the urinary system. After applying the contrast, the function is recorded at time intervals for a better display of parts of the urinary system. It’s not expensive and the highest radiation dose for the patient is low. CTU is a method of modern technology that suppresses classical excretory urography. CTU is based on computer achievements and allows 3D display. As such, it has taken over the indications for IVU and time is slowly pushing IVU out of use. CTU is required to report in a short time, result in better recording quality and it is very possible to reward processing. However, the high radiation dose and expensive performance limit worry-free performance. By introducing different algorithms and using a "low dose" protocol, the dose has been reduced so that CTU is increasingly performed. Post processing techniques show organs in all planes, along with the imaging plane, so it is possible to detect the tiniest creations. Radiological images can be digitally stored and shared with other physicians for easier and better diagnosis. Compared to IVU, CTU has better diagnostic accuracy in detecting the most common pathological conditions of the urinary system and congenital anomalies in children so some institution has completely replaced IVU. The financial capabilities of each institution are different and it is a crucial factor for the performance of CTU but, by successfully addressing all other shortcomings, IVU remains a thing of the past.