Disclosed are a method, a system and a device for displaying a geometry in an editor, and a medium, which are applied to the technical field of two-dimensional/three-dimensional modeling. The method for displaying a geometry in an editor comprises: determining a Boolean operation and a plurality of geometries in a space window (102); calculating the plurality of geometries in the space window according to the Boolean operation, so as to obtain a composite geometry in the space window (104); creating a plurality of objects in the resource list, wherein the plurality of objects respectively correspond to the composite geometry and the plurality of geometries that are calculated to obtain the composite geometry, and setting objects corresponding to the plurality of geometries as sub-nodes of an object corresponding to the composite geometry; and returning to the step of determining a Boolean operation and a plurality of geometries in the space window. The method solves the technical problems in the prior art that a final geometry obtained by multiple Boolean operations is only displayed, while a subordination relationship between the final geometry and an intermediate geometries cannot be displayed intuitively, and the intermediate geometries cannot be modified directly.