Routine urinalysis and urinary ultrasound help to detect many kidney diseases, such as nephritis, kidney stones, etc. However, only these two auxiliary tests cannot exclude all kidney pathologies. Urine routine is a more traditional and common test technique, which can be used for early screening and long-term follow-up of many diseases, and is also an important item for determining the severity and prognosis of renal diseases, and it has an important significance in suggesting renal lesions such as nephritis and renal failure in all types of nephritis. Urological ultrasound helps to rule out the presence of renal tumors, polycystic kidneys, hydronephrosis, kidney stones and other renal pathologies. These two tests can exclude a variety of renal lesions, but they cannot fully reflect the condition of the kidneys. Clinically, renal function tests are also needed to understand the functions of glomerular filtration and tubular reabsorption, which are also of great significance for the exclusion of renal diseases. It is important to note that it is not recommended to look at the results of a certain test in isolation, but should be combined with the symptoms, signs, and indicators of a number of auxiliary tests, etc., and be analyzed and diagnosed comprehensively by a professional physician.