The design with implementation of general microcredit courses is a kind of special innovative type. The related basic principles could be made with: (1) the action- and question-oriented implementation connotation; (2) the interdisciplinary team cooperation, and learning model with group implementation; (3) the regular log of course implementation process; (4) the publication of projects completed, so as to further break the concept of traditional two-credit courses, directing students to participate in lectures, experiments, field-visits, distance learning, workshops, and other interactive applications towards the diversified, open, elastic and autonomous education goal from the integrated learning and practice. This paper sets forth the idea and method of microcredit course design and puts forward the general diversified principles and criteria on course planning, and points out the difficulties and problems confronted during the implementation process, such as: group discussion, teaching hours and time, teacher-student interaction, etc. Finally, several solutions have been proposed, such as, a co-learning day for the whole school, combined courses from different departments, as well as other strategies, for followers to refer to, in improving their interdisciplinary learning effectiveness in the future.