The system adopts STM32 microcontroller as the main control core, based on IoT technology, driving MPU6050, MAX30102 and LM386 modules. Three sensors are designed with heart rate and blood oxygen circuit, motion circuit and sound detection circuit respectively, realizing real-time detection of human health data. Using ESP8266 to connect to the Internet, using MQTT protocol for publishing and subscribing topics, and uploading the collected data to EMQ Cloud. Using Visual Studio Code to design a WeChat mini program to visualize the data, and the data can also be viewed on the OLED screen of the device itself. The sensor data measurement and optimization are completed, and after testing, the relative error of the measurement data of this system is within 5%, and the accuracy of the data is reliable. It can measure human health data well and solve people's needs for their own health concerns.