This study asserts that North Korea's economic development strategy in the Kim Jong-un era has the following three core elements. First, economic development led by science and technology. Second, economic development by attracting foreign capital. Third, economic development based on the active use of the market. In the case of the first two strategies, namely, the strategy through science and technology initiative and the attraction of foreign capital, although there may be a difference in degree, the Kim Jong-il era also witnessed Pyongyang's emphasis on them for economic development. However, the 'persistent' pursuit of the market as a facilitator to economic development is a unique feature only in the Kim Jong-un era. South Korea needs a new method to promote inter-Korean economic cooperation that matches the three core elements and, for this aim, this paper proposes a new method of a B2B platform connecting both Koreas to each other to facilitate inter-Korean economic cooperation.