The importance of early intervention for very young children born at-risk or disabled has been proved by theoretical arguments, empirical evidence, and societal needs. It has been underscored by a major policy commitment in other countries such as the United States (e.g. PL 99-457). However in Korea, Promotion Low for Special Education(PLSE) doesn`t include any support system for children below age 3, who need early intervention service. Therefore, it is very common that public schools including preschools or other educational institutions for special education do not have programs for infants and toddlers with special needs. For the purpose of raising policy issues to expand the field of early intervention in argument, this paper reviewed and analyzed the current practices regarding to the field in terms of both quantity and quality of the service and structural system delivering the service. The paper also brought up several problems facing them. In conclusion, the paper suggested that the field of early intervention can be expanded by establishing the new policy considering the following aspects: (1) conferring service eligibility by the national policy on infants and toddlers with developmental delays including those at-risk; (2) developing a definition and eligibility criteria for infants and toddlers with developmental delays; (3) developing a system to screen infants and toddlers who need early intervention services as early as possible; (4) confirming quality early intervention services for infants and toddlers with developmental delays.