Core skills are common, indispensable skills for anyone who wants to participate in learning and working in the twenty-first century. It is necessary to research and develop the core skills of engineering students to contribute to the improvement of the labor quality of the country. Research on the core skills of engineering students has not shown the specific skills of engineering students has not given a specific scale to evaluate those core skills. The core skills assessment framework is developed based on determining the structure and scale of skills. Based on the assessment framework, teachers can appropriately design the core skills development process for students. This article mainly focuses on research results that will be foundations for developing an assessment framework for the three core skills of engineering students including: technical communication skills, creative problem-solving skills, and technical system thinking skills. These are essential skills that are closely coordinated with the specialized skills of engineering students.