What is the best test for kidney, need to be divided into three cases: First, ordinary checkup, the patient does not have the underlying kidney disease, and there is no clinical manifestation, is a healthy adult, checkup need to check the urine routine, blood kidney function, urinary system ultrasound. Second, the examination found that there is kidney damage, but there is no clinical manifestations, this in the above examination on the basis of, plus 24h urine protein quantitative or microalbuminuria examination, renal ECT examination. Third, the clinical symptoms are obvious and there are abnormalities in urinalysis, urinary color ultrasound kidney without shrinkage, in this case, it is recommended to do renal puncture in order to clarify the type of pathology.