Electronic device with radiating system

The utility model provides an electronic device with a radiating system, which comprises a case, a fan, a main board and a heating element arranged on the main board; the inside of the case is divided into a primary air duct and a secondary air duct; a position on the case which is corresponding to the main air duct is provided with a first air vent and a second air vent; the fan is arranged at the first air vent; the heating element is arranged in the main air duct and on one side of the back side of the main board which is close to the fan. Because of the structure, the heating element on the main board can be separated from other element areas in the case; the air flow heated by the heating element is directly discharged outside the case form the air vents, which can prevent other elements in the case from being indirectly heated; in addition, the heating element is arranged on the back side of the main board, and most air flow driven by the fan can well cool the heating element on the main board; the radi