With the improvement of living standards, people are paying more and more attention to health, and how to monitor the health condition of the body conveniently at all times has become the goal of contemporary high-tech pursuit. The introduction of wearable devices has effectively combined medicine, technology and the Internet. So what is a wearable device? It can actually be called a skin outside the skin. A conductive device made of special materials can cover the surface of the human body and record changes in the body, such as temperature, heart rhythm, breathing, etc. What does the wearable device look like? In fact, wearable devices can be made into undershirts, watches, glasses, gloves, running shoes and other forms to wear on the surface of the human body. With the progress of technology, I believe the form of wearable devices will become more and more colorful. At present, wearable devices in medicine are mainly involved in ECG monitoring, blood pressure monitoring, blood oxygen monitoring and so on. Take ECG monitoring as an example, wearable devices similar to undershirt can record the changes of ECG from time to time, similar to a continuous dynamic ECG. Compared with the traditional dynamic ECG, wearable devices become more convenient and fashionable. Wearable devices not only keep the recorded information at all times, but also connect to surgery and computers through wireless technology. We can observe our heartbeat, body temperature, blood pressure, etc. in real time right on our cell phones and computers. The most important thing is that the wearable device can regularly transfer all the recorded information to the Internet “cloud platform”, through the professional software set professionals can analyze the information, once the heart rhythm, blood pressure and other problems, can be timely found. Through the “cloud platform” data monitoring, we can understand the fluctuation of heart rate, blood pressure, body temperature, etc., and develop a set of optimal individualized management plan. Simply put, wearable devices can help you to receive professional health management wherever and whenever you are. With the progress of technology, it is believed that wearable devices can be applied to more fields in medicine and embedded in people’s lives.