A radiation device for computer or electric appliances includes a heat inhalant block under a CPU of a computer, a heat transmission block positioned next to the heat inhalant block, a bridge block, a peltier device and a cooling source block sequentially disposed on the top of the heat transmission block with a bridge block engaged therebetween, a transparent cover covering the top of the cooling source block to form a left and a right flow canals therein, an upper heat radiation module superimposed a lower heat radiation module positioned next to the heat transmission block, a fan on the top of the upper heat radiation module, a set of the heat pipes extended from the heat inhalant block to the lower heat radiation module through the heat transmission block, a pair of lateral pipes connected between the bridge block and the lower heat radiation module and a set of the cold pipes connected between the cooling source block and the upper heat radiation module.