The rationing evaluation of the economic object’s status is very important in urban planning,regional planning and social economic developing planning.It is the main content of this paper to apply the theory of gravitational field to evaluating the status of the economic object.We can have the aicd of the“gravitational potential energy”concept for it.The status of some economic object is not only related to its own influence,but also the influences of other economic objects,and the status of some economic object includes two parts:one is“potential energy”that this economic object has at the sites of others;the other is“potential energy”that others have at its site.