Industrial software is a critical driver for the transformation of manufacturing industries from reliance on physical resources to innovation-driven growth. However, small and medium-sized enterprises in the printing equipment manufacturing sector face challenges in standardization and resource sharing of industrial software. To address these bottlenecks, this paper proposes a method for constructing industrial software ontology. First, the core knowledge concepts of industrial software are extracted. Next, the classes, hierarchical structures, and attributes of the ontology are defined. Finally, the constructed ontology is visualized, and application studies are conducted. This method establishes a foundation for the efficient sharing of industrial software resources.