The NB wireless emergency alarm button adopts a low-power design for emergency help and alarm prompting. Compared with traditional emergency buttons, it has many advantages such as no wiring, no installation, easy maintenance and low power consumption, and can meet smart wireless emergency alarm applications for big data and the IoT. The emergency button signal is transmitted to the IoT management platform via NB-IoT. After receiving the alarm signal, the management platform can push it to the corresponding administrator via mini-program, PC management platform, network SMS, etc., thereby reducing losses caused by unexpected accidents and safeguarding life and property to the greatest extent. It is not only used in factories but also in homes and cabin hospitals for emergency help alarms; every household needs it, so the market demand is huge. After an alarm, it automatically dials the user's phone, supporting up to 10 user numbers. It provides an open protocol to accelerate the launch of NB IoT emergency alarm buttons by NB platform software manufacturers. The NB emergency alarm button has significant advantages such as easy installation, and is widely used in fire alarm fields such as smart communities, nursing homes, hotels and factories.