Because of information asymmetric in the realities of the day,it is of a great significance to establish a criterion of a scientific reasonable effective economic rents of ability for building modern enterprise institution,improving the corporate governance structure,exploiting and disposing human resource,maximizing a business's value,rationally deploying social resources. A proper criterion of economic rents of ability,a kind of means of simulation,can play a role in objective effective stimulation. It can not only in certain sense dissolve interest conflicts of stimulating goals between the long and the short but also made a sound choose about stimulating levels.