System and method for controlling an electronic device fan

摘要

An electronic device and a method for controlling fan speed of the electronic device include setting a speed range corresponding to a variety of pulse-width modulation (PWM) duty cycles of the fan, and setting a speed variation value of the fan. The method further includes reading the PWM duty cycle and detecting an actual speed of the fan, and adjusting the PWM duty cycle in the PWM duty cycle instruction according to the speed variation value.