The objectives of this study were to identify the roles of field agricultural extension work and its future development directions in the localization process. Literature reviews and participatory research methods were applied to attain the study objectives. Among the identified developmental roles of the field extension work in the localization process were : (1) to build up the agricultural research capability within the locality ; (2) to intensify the field information technology and ; (3) to strengthen the technology management capability of the extension educators.