Based on a brief comment on the ESP teaching and research and on the status quo of ESP teaching in China, this paper has brought about some suggestions of constructing ESP course assessment system with developmental assessment ideas and principles, aiming to attract the ESP practicers and researchers to the practical significance of assessment while they are exploring the ESP teaching theories and designing the course models. We hold that ESP teaching and ESP assessment are a continuum, so when we talk about the course design, the teaching content and the methodologies, we need to take some assessment models into consideration altogether. If the attention is not equally attached to, it will certainly influence one aspect of the development at one time, thus restricting the whole process of the teaching reform.