Intelligent exercise state detection system, the present invention proposes a method and system for detecting the wearer's exercise state including predicting the risk of falling, detecting falls and calculating the amount of exercise. The method and system include: an acceleration sensor for picking up the movement of the wearer, a gyroscope, a magnetometer, an air pressure sensor group, a WIFI module, a GSM/GPRS/3G/4G communication module, a GPS/Beidou positioning module, a power supply module, and control each Modules and microprocessors that process sensor data form wearable smart terminals, servers, computers, and mobile client terminals. Calculate the amount of exercise of the wearer based on the measurement data of the sensor group, predict the risk of the wearer's fall and check the fall event, and transmit the processed result data, event and position information to the mobile terminal or the phone to notify the specific contact through the server. Perform secondary processing, and then achieve a new technology that family members or guardians can better monitor and care for the wearer.