A method includes following operations: a delay line delaying a first clock signal by a delay time to generate an output signal; a controller delaying the output signal by a first time interval to generate a first signal; the controller delaying the first clock signal by a second time interval shorter than the first time interval to generate a second clock signal; and the controller controlling the delay line according to the first signal and the second clock signal to adjust the delay time. A delay locked loop device is also disclosed herein.