In an attempt to examine the pottery production system of Hoseo region in the Middle Bronze Age, the pottery similarity in terms of type and region was analyzed using the coefficient of variation. The period was sub-divided into the Huam-ri stage and the Songguk-ri stage, the region was sub-divided into the Asanman Bay, the western coast of northern Chungcheong Province, the western coast of southern Chungcheong Province, the upper and middle reaches of Geumgang River, and the middle and lower reaches of Geumgang River areas. Analysis was undertaken on jar-type, bowl-type, and red burnished round-type pottery, all of which illustrate distinctive characteristics according to sub-period and sub-region, which appear to be related to the socioeconomic changes that occurred in the Middle Bronze Age. It is proposed that the pottery production system was determined by social, economic, and political factors, and took on various forms depending on the time period and region. The Middle Bronze Age was a period of rapid social change, and the pottery production system would have also changed rapidly, accordingly. This paper examined the site of Gwanchang-ri, in Boryeong, which is a large-scale complex settlement of the Hoseo area where many archaeological features related to pottery production, including kiln clusters, were confirmed. Changes in the production system were identified through an analysis of related features and artifacts. In the Huam-ri stage, a small production system characterized by the division of labor and cooperation was in operation. With the use of the pottery kiln clusters in the Songguk-ri stage, intensive pottery production on a larger scale was carried out. In the Geumgang River Basin, pottery was found to demonstrate a high degree of similarity in the Songguk-ri stage, and it is assumed that pottery production took place in a more systematic manner, compared to that observed at Gwanchang-ri. It is also likely that distribution within the region had occurred. Though this process, the Middle Bronze Age pottery production system appears to have obtained a greater degree of standardization.