The UWB outdoor tracking anchor can receive the UWB broadcast of its surrounding tags and the time synchronization packet of the main anchor broadcast, and transmit the received data to the tracking engine. The tracking engine calculates the position of the tag through a multipoint tracking algorithm. The anchor also receives RFID messages broadcast by the tag, such as SOS, pedometer and heart rate sensor data, and uploads the data to the server. The anchor also sends the server's instructions and messages to the tag through the anchor's built-in RFID module.