The diaspora mission is one of the major issues in global mission work, which has arisen as one of the tasks to be carried out by cross-cultural diaspora groups that have global networks traditionally such as Chinese speaking people, Indian and Filipinos diaspora, and also Koreans who now have finances and skills. Taking this historical opportunity, this author will try to define the concepts of the diaspora and the diaspora mission based on the sense of calling, outline the current status of Korean diaspora mission network, and present the direction of Korean diaspora mission. The missional meaning of the history of the Korean diaspora can be summarized as follows. Firstly, it is commonly held that the Korean emigration started from the middle of the 19th century, which is late compared to other nations. Secondly, the history of Korean emigrants is the history of Korean diaspora mission. Thirdly, the Korean diaspora mission spread very rapidly and widely. Fourthly, the history of Korean diaspora is the history of the overseas Korean churches. Fifthly, the history of Korean diaspora becomes more meaningful when it is reviewed in relation to the current global mission of the Korean Church. The Korean Church Mission implies two concepts, mission of the Korean Church, and mission for the Korean Church. Likewise, diaspora mission has dual meanings, mission for diaspora and mission by diaspora. Moreover, as the word ‘diaspora’ is used as a complex concept, diaspora mission could be expanded in three ways for Korean situation today: first, the mission of the Korean Church through Korean diaspora (or ‘toward’); second, the mission of the Korean Church for (or ‘through’) the immigrants in Korea; third, the mission of the Korean Church for (or ‘through’) cross-cultural diaspora in other regions other than Korea. The history of Korean diaspora is the history of the Korean diaspora mission. The Expansion of Korean diaspora expanded the overseas mission of the Korean Church. The mission movement for Korean diaspora started from North America and extended to the world. This has been a driving force of calling out Korean diaspora to mission field, and presented a new direction for global mission of the Korean Church. In the process, Korean diaspora produced various mission networks. This is a good model for the world mission, which should be promoted through union and agreement with one another. The future global mission of the Korean Church should be carried out through cooperative networks with global churches. Also, the Korean diaspora mission will be a foundation that will expand to the global mission of the Korean Church through cooperation with cross-cultural diaspora and the Global Church.