A portable wearable sleep apnea monitoring system is designed to avoid high cost and low comfort in hospital. The micro controller STM32 is used as core

by controlling sensor

monitor user’s respiratory airflow

oxygen saturation

electrocardiogram（ ECG） and chest movement in real-time

and estimate whether apnea occurs or not. This system records and displays the total number of apnea times all night

and sends all the physical parameters to application programs on smart phone or tablet PC by Bluetooth with low power consumption to doctors for further analysis. Compare the test results of this system with polysomnography

correlation and consistency of apnea hypopnea index（ AHI） measured by two systems is good. This system is simple and practical

patients can get reliable measurement results. It expands the screening scope of sleep apnea syndrome.