SKA's potential fascinated Korean astronomers, as did astronomers in other countries. To respond to this, KASI participated in the EU-Framework program prepSKA with support from the National Research Foundation of Korea, and continues to support SKA-related research activities. Currently, KASI is participating in SKAO as an observer on behalf of Korea. The SKA Korea team, composed of researchers from KASI and Korean Universities, is preparing to contribute to fields directly related to SKA observation, such as broadband data transmission and processing, as well as studies on SKA regional centers using cloud computing and future technologies such as PAFs. From the early universe to the present, especially in the fields of HI distribution, AGN, cosmic magnetism and transients, KASI and Korean astronomers are preparing for the SKA era.