The invention discloses a method and a device for realizing object modeling. The method comprises the following steps of establishing a new object type according to a pre-sealed object type and establishing an object instance according to the established new object type. Through the scheme, the new object type is only needed to be established according to the pre-sealed object type, and the object instance is established according to the established new object type without the need of re-writing a hard code, so that the object modeling is simply realized, and the developing period is shortened.