Abstract: A digital volume controller and a control method thereof are provided. The digital volume controller includes an adjuster, a D flip-flop and a processor. The adjuster outputs a first signal and a second signal according to a rolling direction of the adjuster. There is a phase difference between the first signal and the second signal. The D flip-flop includes a clock terminal coupled to the first signal, a D terminal coupled to the second terminal and a Q terminal coupled to a third signal. When the first signal generates an enabling trigger, the processor generates a volume control signal according to a logic level of the third signal.