This research was motivated by the need to improve educational information services to be more convenient, rapid, and easily accessible for students. The objectives of this study were to develop an automated preliminary information service system using a chatbot on the LINE application for undergraduate students in the Department of Agricultural Engineering, Faculty of Engineering at Kamphaeng Saen, and to evaluate the system’s performance in various aspects.
           This study employed a developmental research approach. The sample group consisted of undergraduate students from the Department of Agricultural Engineering, Faculty of Engineering at Kamphaeng Saen. The research instruments included the developed chatbot system on the LINE application, which provides information such as academic calendars, request forms, course registration, examination schedules, study plans, and related contact information, as well as a user satisfaction questionnaire. Data were analyzed using basic statistics, including mean and standard deviation.
           The results revealed that the overall student opinions toward the chatbot system were at the highest level. Considering three aspects, the findings showed that: system efficiency had a mean score of 4.609 (S.D. = 0.394), system usability had a mean score of 4.563 (S.D. = 0.391), and user satisfaction had a mean score of 4.621 (S.D. = 0.399). These results indicate that the developed chatbot system is efficient, practical for use, and achieves a high level of user satisfaction. Therefore, it can be effectively applied to educational service provision.
           Furthermore, the system can be extended to support educational information services in other departments within the university, helping reduce staff workload and enhance student convenience. Continuous development is recommended to support diverse usage and better respond to students’ future needs.