Measuring the pulse rate of the apparatus and method

The present invention provides a pulse rate measuring apparatus, which includes a microprocessor, a light source, a light sensing unit, and an output device housing; a microprocessor configured to determine a light sensing unit is in contact with the user's skin, and if light sensing unit is determined to be in contact with the skin of the user, the microprocessor is configured to adjust the intensity of the light source, the microprocessor until the predetermined number of consecutive successful identification pulse, pulse rate, and then perform calculations to obtain the output output means outputs the pulse rate; the present invention also provides a method of measuring the pulse rate.