Projecting the demand for teacher training is supposed to be regularly implemented to ensure the sustainable development of a country's education. Preschool education is the first level of education in the national education system with the specific requirements on professionalism as well as the labor characteristics of preschool teachers. The goal of this study is to apply projection equations based on understanding the situation of the Vietnamese preschool teachers as well as the number of graduates, retired teachers, and the number of children to acquire the projection results of the preschool teachers needed for Vietnam in the period 2017 - 2027. The results indicated that the current preschool teachers did not meet the requirements of the education system in terms of quantity. This deficiency might be likely to last for the next ten years and cause many consequences for Vietnamese education if there were no solutions to human educational resources. The result of the projection problem in Vietnam was an experience lesson that should be considered in Asia with distinctive socio-cultural characteristics.