The author of the present paper has seen the fact that there are many kinds and numbers of farmers’ organizations in Taiwan. Also these organizations have played important role in agricultural technology transfer. Therefore he attempts to do this study and write this paper. Four concrete objectives of this study are:(1) to present theoretical concepts of roles and functions of farmers’ organizations in agricultural technology transfer;(2) to evaluate roles and functions of farmers associations in agricultural technology transfer;(3) to investigate roles and functions of other farmers organizations, such as fruit cooperatives, irrigation associations, and various kinds of crop and animal production and marketing organizations, in agricultural technology transfer;(4) to examine role of farmers’ groups in village level in technology transfer. In order to achieve four objectives mentioned above, roles of various kinds of farmers’ organizations technology transfer have been extensively examined. In the final part of this paper the author has made a conclusion and proposed several suggestions. Suggestion emphasize on how to use farmers’ organizations for transferring agricultural technology and for achieving the final result of agricultural development and farmers’ life improvement effectively. The method of the present study is to employ observation, understanding and perception and to review related literature as the basic reference for analyzing and interpreting the main topic of this study.