Embodiments of the present disclosure refers to an electronic device, comprising a first bracket that is made of a first material having a thermal conductivity greater than a first threshold and has therein at least one passage including a chamber; wherein the first bracket and the chamber define a closed space in which a cooling medium having a thermal conductivity greater than a second threshold is able to circulate; and wherein the chamber is provided with a driving body at at least one side wall of the chamber and the driving body is deformable under a perdetermined condition to change a capacity of the chamber so as to drive the cooling medium to flow.