This project expects the integrated database of terminally renal ill patients combines clinical and files of Health Insurance and renal medical society database. It will provide valuable actual evidence data to quality monitoring of dialysis treatment and related academic research. Besides, using the cohort study of chronic renal disease --「epidemiologic research of chronic renal disease」, we can trace the patient continually and analysis different risk factors of chronic renal disease in Taiwan. Taken together, the results of this project --1.1「Integrate the current database of renal disease and establishment of national monitor system」and 1.2「Epidemiologic study in chronic renal disease」-- will provide the basic rules of prevention and treatment, basic research and clinic application in chronic renal disease.