A new method of the system level design for measurability is introduced in this paper. This approach is mainly to partition the system
add test function unit
and realize system rank test in the end. Its application can greatly improve the system measurability
reduce its total life cycle cost
and enhance its \!integrity quality\". In addition
some problems that should be noticed in the process of design are mentioned in the final. It can be predicted that this new method will successfully be applied and developed in many fields.