This study aims to examine the Cross ventilation effect of Daecheongmaru in summer according to the floor plan of Korean traditional housing architecture by region according to the climate characteristics of the Korean Peninsula. This study examines the climate characteristics of the Korean Peninsula and identifies the floor plan of Korean traditional housing architecture that appears accordingly. In particular, the purpose of Korean traditional housing architecture is to examine the nature-friendly construction techniques and ventilation effects of Korean traditional architecture through natural ventilation by focusing on Daecheongmaru, which is generally highly utilized in summer. The following conclusions were drawn. First, the plane form of traditional housing architecture is judged to have an overall advantageous plane form in the summer natural ventilation effect. Second, the natural ventilation effect of Daecheongmaru according to the plane shape of traditional housing architecture appeared in the order of ㄱ-shape, ㅡ-shape, ㅁ-shape, and ㄷ-shape. Third, the Daecheongmaru of traditional housing architecture is judged to be suitable for its role as a central space for summer life due to the formation of an open space in the front and back.