In accordance with the policy and environmental changes of domestic and foreign energy, it is necessary to make efforts to promote the offshore wind power generation business reasonably and efficiently. For this purpose, analysis of the levelized cost of energy(LCOE) for the offshore wind farm development is required first. In this
study, the analysis method of the LCOE for various types of support structure types in the South-West Sea offshore wind farm will be proposed. Based on this, reasonable and efficient support structure types.