A conveyer system for vertically and helically conveying a workpiece includes a main bracket, on which interconnected heating furnace and cooling furnace are arranged in parallel. The heating furnace includes a 1st spiral supporting plate, a conveyer belt arranged on the 1st spiral supporting plate along the spiral direction and one or multiple gas inlet/inlets to fill protective gas into the heating furnace. The cooling furnace includes a 2nd spiral supporting plate, the conveyer belt extended from the heating furnace arranged on the 2nd spiral supporting plate along the spiral direction and one or multiple gas inlet/inlets to fill protective gas into the cooling furnace. A drive mechanism for a conveyer belt is installed on the main bracket. The conveyer belt runs through the heating furnace and cooling furnace and forms one loop via the drive mechanism.