Large-scale construction of offshore wind farm, which is not restarted to space compared to land, has been in progress recently as the interest of new generation energy is globally raised following global warning and extreme weather change. Moreover, there is a great attention to jack-up barge installation system for massive construction of offshore wind farm. This research analyzed Spudcan's bearing capacity per each depth and analysis of soil behavior as it’s penetrated in the shore of southwest sea through penetration analysis using by numerical analysis. In the result of the bearing capacity examination, it is difficult to maintain the system in southwest seashore foundations, which are mostly formed with silt and clay. Therefore, more accurate research regarding bearing capacity should be performed for safety accident prevention.