Looking at the structure of the hanok, the hanok has a structure to trim the trees, to set up pillars, to see them, and to put together the small horses, horns, tori and rafters. This basic skeleton of hanok has a different structure depending on the province, the upper stream, the private house, and the use function. For example, in the northern region, the most effective structure to prevent external cold air and maintain internal heat has developed a double-layered structure with two rows of rooms and a low-roofed hanok