An efficient ESP learning plays a very major role in all the syllabi. This is why teachers, course designers and material writers consider learners' need as an indispensible part of syllabus. Also, the analysis of the particular needs of a special learner group is considered as an introductory part for evaluating an ESP textbook. Having to say this, this paper (the present study) tends to analyze the 'Agricultural Extension and Rural Development ESP Textbook' taught in Bu Ali Sina University. Therefore, this ESP textbook was evaluated by making the best use of Hutchinson and Waters' Framework. Then, the adaptability of the content of these textbooks in agricultural extension and rural development had been discussed regarding the learners' needs. Finally, regarding the presented results on the evaluation of ESP textbooks, it is found that these ESP textbooks are highly appropriate and proper for the students of the mentioned course in Bu Ali Sina University and this textbook is very compatible to students' requirements and success.