An electronic device includes a display, a cover, and a blocking board. The display defines a rear side. A motherboard and a first cooling assembly are secured to the rear side of the display, and a second cooling assembly is secured to the motherboard. The cover is secured to the rear side for coving the rear side, and defines a number of air inlets and air outlets. The blocking board is secured to a side of the motherboard, and located between the first cooling assembly and the second cooling assembly. A first air path is defined by the air inlet, the display, the first cooling assembly, and the air outlet, and a second air path is defined by the air inlet, the motherboard, the second cooling assembly, and the air outlet. The first air path and the second air path are divided by the blocking board.