Development of warning information system heart rate. Objective to study the system of remote medical treatments by focusing on the patients with heart because The symptoms of the patients with cardiac arrhythmias occurred acute or abrupt. The symptom is irregular. Sometimes occurs in a short time by the symptoms of these patients, doctors must follow the symptoms and the data of heart rate closely, so to make an analysis of medical professionals more efficiently. It requires the use of medical technology development information distance by heart rate. With the ability to record the heart rate of the patients all the time if it is put into the database. The pulse detector And medical expert can browse the retrospective data on Web based that connect to the database created them to analyze the disease further. The developed system has the ability to get the values of heart rate and oxygen level in the blood of patients into the web support data and shown to attending physician can view information in order to analyze the symptoms of the disease by patients don"t need to take measurements as it has. Long at the time. By the measurement of heart rate that the machine Raspberry PI developer applied with sensors measure to measure heart rate and send the results were collected in ฐานข้อมูลที่ inward. And development of the web web based can provide the data obtained show and converted to system users can read the information work more convenient.