The quality of graduating design is a key problem related to the students practical and innovative ability. The thought of establishing the quality system is proposed for the building department of Tongji University, and a goal of the quality system is also given in this paper. The content, the method and the effect of the quality system is discussed, including the topic of which the teachers give and the students select, the answer of students’ paper or design, and the process of all the information preservation about graduating design.