Interchangeability and Measurement Technology is a core course in the field of Mechanical Manufacturing and Its Automation. Based on a series of Chinese National Standards of Geometrical Production Specification and Verification (GPS), this course systematically introduces the definitions and basic features of the tolerances and fits of dimensions, geometries and surface structures; the basic concept and application of the national standards; the measurements and evaluation of the errors in dimensions, geometries and surface structures. In addition, this course introduces the design method for the accuracy of machinery as well. This course will help the students to learn the basic knowledge and technology of the design and measurement for the accuracy of machinery.