.This article introduces how and why the 'Six Thinking Hats' system of Edward de Bono, which makes use of lateral thinking, parallel thinking and critical thinking, is utilized as the set of tools for teaching and learning English for Special Purpose (ESP) at the Philology Faculty of Hanoi National University of Education (HNUE). This study of the use of 'Six Thinking Hats' system was carried out in three steps: I)-Designing the questionnaire to be given to 41 students of Philology at HNUE who were taking an ESP course. The questions sought to identify the students' attitude and desires when taking the ESP course, evaluate the piloted syllabus and discover- the most effective assessment method
2)-Analyzing the :data collected
3)- Revising the syllabus and the piloted textbook.