Imaging should be done for all people with clinical symptoms of urinary stones, and the results are of great value for further examination and treatment of stones. 1. Ultrasound Ultrasound examination is simple, economical and non-invasive, and can detect X-ray positive and negative stones above 2 mm. Ultrasound can be used as a routine examination method for urinary stones, especially as the method of choice in case of renal colic. 2. Urogram (KUB plain film) can detect about 90% of X-ray positive stones, and can roughly determine the location, shape, size and number of stones, and initially suggest the chemical nature of stones. Therefore, it can be used as a routine method for stone examination. 3.Intravenous urography (IVU) Intravenous urography should be performed on the basis of plain radiographs of the urinary tract. Its value is to understand the anatomy of the urinary tract, to determine the location of stones in the urinary tract, to detect X-ray negative stones that cannot be shown on plain radiographs, and to identify suspected calcified foci on plain radiographs. In addition, it can also understand the function of the divided kidney and determine the degree of hydronephrosis. 4.CT scan The sensitivity of CT diagnosis of stones is higher than that of plain urography and intravenous urography, which is especially suitable for the diagnosis of patients with acute renal colic and can be an important supplement to X-ray examination. In addition, the composition and fragility of stones can be initially evaluated by different changes in CT values, which can provide a reference for the choice of treatment.