Brain blood oxygen monitoring method, terminal and brain blood oxygen monitoring system

The invention provides a brain blood oxygen monitoring method, a terminal and a brain blood oxygen monitoring system.The method is achieved on the basis of a brain blood oxygen sensor arranged on the forehead of a measured user, and comprises the steps that physical sign information of the measured user is obtained, and the thickness of covering tissue of the measured user is predicted; the covering tissue refers to a tissue covering cerebral cortex; determining a first distance based on the thickness of the covering tissue, and adjusting the distance between the light source array and the receiver array as the first distance; acquiring optical signal data of the receiver array, and processing the optical signal data to obtain the initial brain blood oxygen content of the tested user; acquiring ambient brightness and light source brightness when the brain blood oxygen sensor performs detection, and calculating a correction coefficient of the initial brain blood oxygen content based on the ambient brightness,