The invention relates to a medium mechanism used for vacuum sealing heat emission and a method thereof, comprising a first channel, a second channel and a sealing channel, one end of the first channeland the second channel is respectively connected with an air extraction unit or a medium supply unit for heat emission, and the other end extends to interpenetrate to the sealing channel, which is arranged with a sealing component. The sealing component is equipped with an output channel, to vacuumize for the first channel or the second channel or lead in heat emission medium.