The objective of this research is to develop web-based English instructional materials which enable to promote students’ independent learning at university context. To comprehend this objective, the researcher employs R & D (Research and Development) design by mixing quantitative and qualitative methods. This research is conducted at Faculty of Engineering Tadulako University. The subjects of the study are the lecturers who teach English for the general course and the students of faculty of Engineering. Subject matter experts were also involved to validate the product. The data were collected through semi-structured interview; study the related documents and the results of questionnaire distribution. The data in these phases were analyzed quantitatively and qualitatively. In reference to data analysis, five findings are documented as explored in this part of the article. In summary, the development of web-based English instructional materials oriented to promote independent learning is effective and responded positively both lecturers and students. With the various supported activities and along with the flexible learning atmosphere and methods of delivery, the web-based English instructional materials are effective to promote students’ independent learning.