The utility model discloses an analytic system is measured to people body fat fat, include an original data for gathering human fatty thickness of designateing the position, send original data to cloud data processing device and receive cloud data processing device's analysis result's bracelet measuring device, bracelet measuring device is including the connecting band of measuring the main part and being used for binding mutually with the wrist, the connecting band is connected in measuring the main part, be equipped with the near -infrared transmitting probe that is used for launching near infrared in the measurement main part, a photoelectric sensor for receiving the near infrared of people's volume scattering changes output voltage into, a button for showing analysis result's display device and be used for controlling bracelet measuring device and start, a cloud data processing device, bracelet measuring device signal connection in cloud data processing device for passing through BP neural network algorithm handles original data this kind of analytic system is measured to people body fat fat can measure the fat volume more conveniently and effectively utilize recording the fatvolume.