Ultrasound of the urinary system can detect stones over 4mm in the urinary system and can be used for the purpose of confirming the diagnosis. Ultrasound of the urinary system its features of no radiation and no pain during the examination, so it can be the first choice of examination for patients who are suspected of having stones. With ultrasound, it provides a complete view of the morphology of the ureteral bladder of the kidney and its determination of the presence of stones. However, it still has a certain rate of error, especially in the examination of ureteral stones. Patients who have a relatively distended bowel may not be examined to detect stones in the middle part of the ureter because of intestinal gas interfering with the ultrasound. During the examination of bladder stones, it is possible to miss stones in the bladder if the patient does not hold urine well in the bladder. For the majority of urinary stones, the diagnosis can be confirmed by ultrasound and can be recommended as a first choice test for urinary stones.