TOI technique was used to measure the heart rate, respiration, blood pressure, heart rate variability, psychological pressure, etc. At the same time, the urine protein, creatinine, urea nitrogen and other results of these patients were measured. According to the different renal function, they were divided into observation group and control group, and 100 ordinary hospitalized patients with renal insufficiency were selected as positive control group. The relationship between TOI composite index and renal function in hypertensive emergency patients was compared. The data management platform provides intelligent management of patients' out-of-hospital follow-up, and the dynamic physiological indicators and psychological assessment data of patients are mastered through the hospital port, so as to provide telemedicine guidance for patients, so as to improve the prognosis of hypertensive emergency patients.