Abstract: Miniaturization of medical devices places stringent demands on power consumption control in electronic devices. This paper constructs a hierarchical power management architecture, using an STM32L476RG processor, an ADS1298 data acquisition chip, and a Nordic nRF52832 Bluetooth module to build the system. This system consumes only 0.08 mW in deep sleep mode and can operate continuously for over 48 hours on a 200 mAh battery. Experimental measurements show an accuracy of 96.8% for ECG monitoring and 94.5% for blood glucose monitoring, validating the effectiveness of the low-power design.