In response to the problems of delayed response in elderly care at home and in the community, inconvenient positioning, inability to call for help in case of sudden illness, and easy getting lost, this paper designs an intelligent monitoring system suitable for the elderly. The system takes the STC12C5A60S2 single-chip microcomputer as the core, integrates the PulseSensor heart rate sensor, DS18B20 temperature sensor, GT-U7 GPS module and buzzer, and adopts the "hardware integration + software control" mode. Data transmission is achieved through single-wire and serial communication without the need for additional conversion modules, simplifying the hardware design. The system can accurately monitor the physiological parameters of the elderly such as heart rate and body temperature, output real-time positioning information, and automatically trigger an alarm in case of abnormality. It operates stably and is easy to operate. This system effectively compensates for the shortcomings of traditional monitoring, can comprehensively ensure the safety of the elderly, and has controllable costs and strong practicality. It is suitable for home and community elderly care scenarios and can meet the daily monitoring needs of the elderly, with high promotion value and application prospects.