An electronic device includes a main frame structure, a plurality of functional modules fixed to the main frame structure, a plurality of cables connecting the functional modules, a cable collector board fixed to the main frame structure, and a motherboard detachably connected to the main frame structure. The cable collector board includes a plurality of first printed circuits electrically collecting the cables, and a first connector electrically collecting the first printed circuits. The motherboard includes a plurality of second printed circuits and a second connector collecting the second printed circuits. The second connector is detachably electrically connected to the first connector.