An electronic device includes a plurality of electronic components and a cooling system. The cooling system includes a chassis defining an airflow channel including an air inlet and an opposing air outlet, a fan assembly including a plurality of fans located at the air outlet, a valve assembly including a plurality of valve plates located at the air inlet, and a control unit controlling the operation of the fan assembly and of the valve assembly. When only some of the electronic components are operated, the operated electronic components send a signal to the control unit, the control unit calculates the particular valve plates and fans which need to be activated, and activates or starts only the relevant and required valve plates and fans to cool the electronic components.