The outcome-based learning is a new learning system that has been introduced to improve the traditional learning system, which is to add qualitative assessment elements. OBE is a student-centred learning system that focuses not only on the final examination results of students (Cognitive Domain), but also on other learning outcomes (Psychomotor & Affective Domains) that can add more value to students. This study was carried out to determine the performance among lecturers in Department of Mechanical Engineering, Polytechnic Kota Bharu, in adapting the OBE system through their learning and teaching process. It was conducted on 85 lecturers at the Department of Mechanical Engineering, Kota Bharu Polytechnic, Kelantan and the instrument used is the Learning and Teaching Monitoring Instrument which consisted of five main domains. These five domains are Domain 1; Learning and Teaching Planning, Domain 2; Instructional, Domain 3; Lecturer Competency and Professionalism, Domain 4; Lecture Room Management and Domain 5; Teaching and Learning Science, Mathematics and Technical in English (PPSMTI). Results shown that the PPSMTI domain had the lowest score (Mean Percentage = 76.80) and it was followed by the score for Instructional domain (Mean Percentage = 79.75), Lecturer Competency and Professionalism domain (Mean Percent = 82.77), Class Management (Theory/Practical) (Mean Percentage = 82.81) and finally Learning and Teaching Planning that showed the highest score (Mean Percentage = 83.21). These results were used to improve the performance among lecturers in utilizing the OBE system throughout their teaching process. Few recommendations such as English courses, mock teaching and training for lecturers are expected to upgrade the quality of lecturers' teaching as well as boost their performance during the teaching process. It is also expected to affect the learning of students.