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Unfortunately a method of westernized light, heavy timber construction system, being popular, are applied widely to the construction of a wooden building at present in Korea. Because the more increase of introducing of foreign techniques and importing the related materials reduces the consumption of domestic materials, are confused identity on architectural thought corresponding traditional wood structural system. Thus, in this study a prefab wood structural system is developed having the competitiveness in culture and inheriting the structural characteristics of Korean architecture. The contents and extents of this study are outlined as the practical design of traditional wood structure using its joint system, the development and manufacture of parts, and the experimental tests on joint system such as beam, column, and tenon connections. The elements for realizing the traditional wood structure can be found by analyzing the methods of construction and the structural characteristics of wood structures in Korea dynasty era. The specimens proposed in a draft were made of material woods and glulams. Tests are carried out to confirm the structural capacities and characteristics of traditional wood structures. The full size joint specimens were assembled and it reflected the effect of variables in design such as the optimum dovetail size, the method of connecting between beam and column, and the method between beams. The result of structural test, the dovetail used in the traditional wood structure has been confirmed to have a ability of resisting the lateral forces. But it is needed to be careful in keeping the accuracy in construction and minimizing the deformation due to the change in moisture content.