Waterproof electronic device and fan device thereof

A waterproof electronic device, comprising:

• a housing;
• a system component region, comprising a first connecting device exposed to the housing;
• a waterproof wall, wherein a fan receiving area, a wire passing area, and an opening exposed to the housing are defined by the waterproof wall, the wire passing area is arranged between the fan receiving area and the opening the opening corresponds in position to the first connecting device, and the first connecting device comprises a plurality of contacts exposed through the opening;
• and
• a fan device, comprising a fan lid, a fan body, a cable, and a second connecting device, wherein the fan lid is fixed to the waterproof wall, covers the fan receiving area, and extends to the opening, the fan body is disposed in the fan receiving area, the cable is connected to the fan body and the second connecting device and passes through the wire passing area, and the second connecting device is coupled to the first connecting device.