Wearing smart wristbands for elderly residents enables Care Worker to quickly access their real-time location. Using Bluetooth Angle of Arrival (AoA) technology, the system achieves positioning accuracy within 10 centimeters. Wandering prevention is implemented within designated zones to ensure residents remain within safe activity areas. Movement trajectories are recorded to facilitate tracking in case contact with a resident is lost. Vital signs such as heart rate, blood oxygen saturation (SPO2), respiratory rate, body temperature, and non-invasive blood pressure (NIBP) are monitored in real time. Wristband automatically triggers an alert to notify care staff immediately if abnormal activity is detected. Through big data analysis, effective behavioral management and prediction can be achieved—for example, understanding residents’ activity patterns at different times of day to optimize staffing arrangements accordingly.