Biochemistry and molecular biology is one of the most important professional basic courses for students in medical universities.Constructing scientific teaching quality control system for biochemistry and molecular biology is essential for improving its teaching quality.This paper discussed on some principles needed to be followed in constructing the teaching quality control system for biochemistry and molecular biology in medical universities and elucidated the three leveled frame of this system including university,college and department.This paper also illuminated on the main contents,implementation,organization system,evaluation system and incentive measures of this teaching quality control system.