An integrated liquid-cooled heat dissipation system includes a heat dissipation device, a pumping device, a water reservoir, and a heat absorption device. The heat dissipation device, the pumping device, the water reservoir, and the heat absorption device are integrated as a whole and interconnected with each other, a main body of the heat dissipation device is provided with the pumping device; the water reservoir is integratedly arranged on and connected to the heat dissipation device; and the heat absorption device is arranged on the water reservoir.