The subject innovation is to simply constituted to be, heating means and cooling means according to one of the heat treatment furnace is heated for a cooling means integrally and improve the heating means, to enhance the heating efficiency and the cooling efficiency of the heat-treated object and shorten the working time improve work efficiency sikimyeo will have to be able to reduce production costs. To this end, the upper casing 100, which in the heat treatment for heating a cooling means is forming the upper outer shape of the furnace; A lower casing 101 which in combination with the upper casing 100, forming a lower appearance; A plurality of supports provided on the bottom surface of the lower casing 101, 105; Fixing the holder 110 to the bottom surface in the lower casing 101, is installed side by side with the support 105 holding the heat-treated object; Stand 105 is installed on a top number of heating grid for heating the heat-treated object is placed from a lower portion to; Lower casing tube cold box 120 into which the cooling water in the upper region constituting the cooling means of the fresh water by being adjacent the inclined plate to be installed and 121 is installed in the inclined plate 121 to 101; And heating for a grid that includes the power supply control unit for supplying the proper current so as to maintain the heat treatment optimal temperature, characterized in that the heat-treated object treated at the optimal level by heating grid for the cool-down of the box cylinder 120 for immediate heat treatment cooling It shall be.