In clinical renal function seven tests commonly include blood creatinine, blood urea nitrogen, blood β2-microglobulin, urine protein, urine β2-microglobulin, urine immunoglobulin G, urine secretory immunoglobulin A. The seven tests are not completely fixed, and it is recommended to consult the local hospital. Renal function seven items are not completely fixed, it is recommended to consult the local hospital. Renal function seven items can reflect the state of renal function, commonly used in the screening and diagnosis of urinary system diseases, and help to distinguish between glomerular disease and tubular disease. Blood creatinine, blood urea nitrogen, blood β2 microglobulin are recommended to fast for 8 to 12 hours before the examination, and avoid eating high protein food for three days before the examination; urine protein, urine β2 microglobulin, urine immunoglobulin G, urine secretory immunoglobulin A are recommended to be examined with morning urine. It is recommended that patients pay attention to rest, avoid exertion and staying up late, so as not to affect the test results. If patients need to improve the renal function tests, we suggest them to go to regular hospitals to have the test results prescribed and evaluated by professional doctors.