Teacher is always a key factor which determines training quality in general and vocational training quality of the Vocational Education System (VES) in particular. In face of strong influences from the fourth industrial revolution (IR 4.0), teacher is getting more important in training of human resources, especially qualification level and capacity to apply technology and innovate teaching methods. Based on the analysis for impacts of the IR 4.0 on VES, requirements for capacity of teachers and the reality on vocational education teachers (VETs) today, this article suggests some solutions to develop VETs to adapt to the IR 4.0 as a basis for development of teachers at vocational education institutions in Vietnam