Based on the comprehensive analysis of existing BIM education forms and in-depth analysis of its problems, this paper proposes an online BIM education knowledge system consisting of professional knowledge, software knowledge, software operation knowledge and project application knowledge according to the closed-loop management theory. And an online BIM education process system consisting of pre-class video preview, pre-class question guidance, professional knowledge explanation, software knowledge explanation, operation method explanation, operation exercise, project application explanation, classroom project exercise, after-class exercise and after-class project exercise.Thus, it forms the closed-loop management system of online education, and finally makes a case study on the systematic application of this system in the basic BIM course of a university.