In this paper，we propose a new method to merge the logic with the object oriented paradigm, We intend to introduce the typical concepts of object oriented systems in the logic paradigm，without losing its advantages as a declarative language. An extensive Herbrand interpretation has been given to interpret thd logic semantics and the object oriented semantics uniformly. Based on this method, we design and implement an object oriented logic system. In the end. the paper gives the object primitives of the system.