This writing is to understand some trends and its meaning of Regionalism Architecture in Jeju Island since 1950's.This thesis began with an interestin the identity crisis implicitin the simultaneous striving formodernism and the so-called regionalvalues in Jeju Island.Regionalism is a response in architecturalterms to re-establish continuity in a given place between pastand presentforms,and also a uniqueresultrelated to particularplaces,culturesand climatesin region.Thisisone wayoflookingattheissuesofregionalidentity. Thestudy began by observing thegeneralcharacteristicsofcontemporary ideason Regionalism inJejuarchitecture.Thismeansthattracingthehistoryofdevelopmentof Regionalism architecture in research area is notthe focus ofthis thesis.The thesis demonstratesthatRegionalism architecturesin Jeju showssometrendsrelated to the local cultural elements (or ideas) such like traditionalarchitectural forms,natural environment,local construction-materials,etc.In summation,in the perspective of Regionalism architecture,mostofbuildingsin Jeju bring outthem only asvernacular architectureasitwasonceproduced,by thesimplecombination andimitation without anycreativeinteractionoftheregionalculture. Istressthe pointin thispaperthat,in overthelastfifty years,therehavebeen very narrowed attemptstodesign theregionalvaluesin themain,and alsopointout thatthereareproblemsinthemannerinwhichlocalarchitectshavegoneabouttrying to define the regional themes.So,a grate depth is required to understand the phenomenonthatJejuareaiswithitsvariousnuancesoftraditions,art,culture,climate and lightand then to reinterpretitinto the modern building type with allthe high sense.In addition to that,someconclusionsarereached on futuredirectionsand the significanceofthestudy.