This essay analyzes the current market conditions facing the Protestant church with the concept of Habermas` ``colonization of the life-world``. In the first half of the essay, I elucidate Habermas` critical concepts, such as ``life-world``, ``system``, and the ``colonization``, along the line of his major work, The Theory of Communicative Action. In the second half, by employing those concepts, I tackle the current religious, especially Protestant church, problems in Korea and search for solutions. According to the phenomenological tradition, the ``life-world`` signifies some kind of pre-structured, intersubjective, and self-evident ``foundation``. Traditionally, religion has been in charge of perpetuating the cultural patterns associated with the life-world, especially with respect to certain moral obligations and worldviews. On the other hand, the ``system`` signifies technical control rules based on the ``instrumental rationality`` (Zweckrationalitat), mediated through the non-linguistic communication medium, such as ``money`` or ``power``. Habermas phrases with metaphor of ``colonization`` the process that the ``life-world`` is replaced by more explicit and functional knowledge and instrumentalized by the excessive increase of system complexity. In such a situation, religion is also evaluated by media of the system, i.e. the criterion of ``money`` or ``power``. In this essay, I analyze the religious market context from the three different aspects: (1) the market competition structure of Protes tant church, (2) the importance of advertizing in the religious market, and (3) the comparison between huge corporations and mega churches. The outcome of the analysis can be summarized as follows: (1) The market competitors of a Protestant local church are not other confessions, but another Protestant local church which has similar ``goods`` and therefore similar or the same ``customers``. (2) In order to expand the market for the entire Protestant church, the efforts to improve the integrated image of the Protestant church should be made beyond the level of the local church. (3) The number of franchised local churches which employ a famous church name with its regional title in order to enhance both reliability and popularity is growing. Under these circumstances, the phenomenon of ``goal displacement`` appears such that not ``salvation of souls`` but the maintenance and development of the religious organization itself is highly regarded. In order to overcome this problematic, the process of market rationalization that helps remove the negative elements and improve transparence rather than mere ``decolonization`` should be requested. This essay proposes such solutions as ecclesiastical union movement from the bottom, escape from the minister mass production system and theological education system that is sensitive to the current market.