Localization of extension services in 1997 has weakened the linkage and cooperation between the central and district extension agencies(Provincial Agricultural Research & Extension Services and City & County Technology Centers). Since agriculture needs a national or regional dimension approach in many senses, it is important for agricultural prosperity to maintain and even further strengthen the practice of cooperation between different levels of governments and extension agencies.The objective of this study was to suggest policy measures to strengthen the linkage and cooperation between agricultural extension agencies. Existing works were reviewed to see a general picture of problems associated with he localization of extension services. In order to gain insight into policy measures, questionnaire surveys to extension staffs in districts(8 of 9 Provincial Agricultural Research & Extension Services and 160 of City & County Technology Centers) were conducted. Survey respondents were mainly asked about policy measures which would contribute to strengthen the linkage and cooperation between extension service agencies.Three policy measures derived from the study are: to expand the professional and technological education at the central level; to establish the central－local partnership; and to strengthen the linkage and cooperation between city & county agricultural technology centers.