The background of this research question comes from teachers of the vocational high school in Indonesia who are difficulties and not sure apply WEB-Based learning to students of Computer and Network engineering program. To answer that question, researchers are developing a learning model based on Electronic Learning Systems (WELS) web-based. The development process is done through Research and Development Approach. From this WELS model, then used in learning on computer technique and network technique and the result is quite effective. Then tested the level of relationship between WELS with the level of effectiveness obtained, the results showed a positive and significant relationship on vocational school students in Indonesia, especially in vocational high school "Dharma Nusantara". In order to produce better future research, we recommend that further research is undertaken by examining other factors that may contribute to and influence the improvement of WELS for all vocational high schools in Indonesia.