This study suggests the role and developmental directions of youth organizations for emerging adulthood based on the analyses of the general discussions and characteristics of the emerging adulthood. The definition of the emerging adulthood is provided as young people between 18 and 25 years of age and common issues and challenges of Korean young people are examined including the age of identity exploration||| age of instability||| self-focused age||| age of feeling in between||| and age of possibilities as indicated by Arnett. The meaning and function of youth organization is summarized by social||| personal||| and environmental sectors and the role of youth organization is provided with three directions of 1) competence development of the emerging adulthood||| 2) capacity building of youth organization management||| and 3) improvement of the youth organization's characteristics toward the main force of youth movement. Youth policy of the future-oriented and advanced country type is expected based on the law-bsaed institutionalization to include the emerging adulthood as one of the major subject of youth policy in Korea.