This study researched the reality of STEAM Education knowledge and practical kills of 274 managers (9) and preschool teachers (265) teaching children aged 3-6 in three provinces of Central Vietnam: Thua Thien Hue, Da Nang, and Dak Lak. This is a quantitative study using the teacher's rubric on the Likert scale of 4 degrees (for self-assessment questions about knowledge) and 6 degrees (for self-assessment questions about skills). The results showed that the knowledge and practice of preschool teachers about STEAM education for preschoolers were not high. Educators self-assess that they have some understanding of STEAM education (level 3\4) and skills that need further improvement (level 3\6), in which the planning skill group has the lowest average score. There was a positive correlation between the variables of knowledge and practical skills of STEAM education. Comparing the knowledge and practical skills of preschool teachers among the three provinces pointed out that there is no significant difference in knowledge but there is a significant difference in the practical skills of preschool teachers. This is the basis for conducting further studies towards training and fostering to improve knowledge and practice for preschool teachers on STEAM education in accordance with the characteristics of human resources in each locality.