The core idea of the critical regionalism could be summarized as a self-conscious synthesis between universal civilization and world culture. After World War Ⅱ, it has been applied to architecture for overcoming the problem of Industrial Capitalism and uniformity of 20th century Modern Architecture. Naturally, religious architecture cannot also be an exception in this cultural trend, thus we can also apply the critical regionalism to the Korean Catholic Church Architecture with the basic premise that the Traditional Western and Modern Style Church Architecture should be regarded as universal civilization, and the Traditional Korean Architecture and endemicity as one of world culture. In the context, this article attempts to analyze the regionality of Korean Modern Catholic Church Architecture constructed between the 19th century and 1980's, and how it has been differently transformed with the view of the critical regionalism. Its analysis will be carried out within three types; transformation of the Traditional Korean Architecture and the influence of Japanese Modern Architecture, representation of the Traditional Korean Architecture, and abstraction of the Traditional Korean Architecture with each advantages and disadvantages.