In this paper, based on the classification standard of Lall(2000) to classify the 62 products of SITC Rev.3 two digit level, we calculate the dominant comparative advantage index and similarity index of the export product to measure the competitiveness between Korea and other East Asian economies, and then compute inter-industry complementarity index and intra-industry complementarity index to measure the complementarity between Korea and East Asian economies during 1992-2014. The results show as follows; First, the similarity index of export product between Korea and Japan is the strongest, and the advantages of the export commodities of the two countries are all capital intensive goods and technology intensive goods. Second, the advantages of export goods of other economies are growing, but there are still some gaps compared with Korea. Third, the inter-industry trade between Korea and other East Asian economies has been weakened. Fourth, the trade of resource intensive products is mainly determined by the inter-industry mode, and the trade of the labor-intensive products are mainly decided by the inter-industry mode and intra-industry mode as well. In addition, the trade of capital intensive products and technology intensive products are brought by intra-industry between Korea and other East Asian economies.