Glomerulonephritis can be diagnosed by urine examination, blood test, and renal puncture biopsy. Glomerulonephritis is characterized by edema, proteinuria, hematuria, hypertension, decreased or absent urine output, and normal or decreased renal function, and can be classified into acute glomerulonephritis, acute glomerulonephritis, chronic glomerulonephritis, and cryptogenic glomerulonephritis. The general term glomerulonephritis often refers to primary chronic nephritis if not specified. Urine examination: mainly includes urine protein characterization, 24-hour urine protein quantification, urine hemoglobin qualitative test, urine microscopy. Blood test: mainly includes blood biochemistry test, renal function test, routine blood test and so on. For example, acute glomerulonephritis mostly has transient renal function decline; acute progressive glomerulonephritis can have renal failure in a short period of time; chronic glomerulonephritis can have different degrees of renal function decline; cryptogenic glomerulonephritis mostly has no renal function change. Renal puncture biopsy: it can clarify the specific pathologic typing. For example, acute glomerulonephritis shows diffuse glomerulopathy, acute glomerulonephritis can be seen as renal capsule crescent formation, chronic nephritis can be seen as glomerulosclerosis, atrophy, fibrosis. The diagnosis of glomerulonephritis should be carried out under the guidance of professional physicians, and patients need to go to the hospital in time to get a clear diagnosis and active treatment.