Kidney disease is a serious health hazard of the urological system, prone to recurrent attacks and difficult to heal. Especially when nephritis develops to renal failure, it becomes more difficult to treat when lesions are produced in various systems of the body, such as diabetes, hypertension, heart disease, liver disease and decreased hematopoietic function. Kidney disease is a stalking and persistent disease, which is very difficult to treat by general methods. Therefore, early detection and treatment are necessary to prevent the disease from becoming very serious in the end and it is too late to regret. The analysis and testing of urine is the most important measure to detect kidney disease. It is the first indicator of kidney or urinary tract disease. It is necessary to do urinalysis when the following conditions occur 1.When foam appears in urine; 2.When high blood pressure is found by chance; 3.When hematuria can be found by naked eyes and the color of urine turns dark; 4.When swelling is found, such as swelling of eyelids, face or lower limbs; 5.When dizziness, headache, insomnia, forgetfulness, lumbago, fatigue, dry mouth, fever in hands and feet, fear of cold and heel and shin pain; 6.When frequent urination, urgent urination, painful urination and lumbago are found; 7.When bleeding spots or allergic purpura are found on the body; 8, diabetic patients with more than 5 years of disease, urine foam and poor vision; 9, a history of nephritis.