Based on the Dynamic Assessment Theory, this paper proposes a dynamic assessment model for web multimedia- based college English teaching course, which integrates formative and summative assessment and assesses from qualitative and quan- titative aspects. In this model, the intervention and interaction assessment mode goes through all the students' online learning process, with a focus on the quantitative assessment of learners' linguistic knowledge and competence, and on the training of indi- vidual' s learning attitude and learning s...