Desigen of product horizantal link library using granular computing

Product horizontal link library is composed of the found the library, the update of the library, irrelative data entry, as well as data update. We use granular computing in design process of the library. Each module needs to interact with the category tree, which is essential to the realization of the system. Category tree´s establishment contains two steps: first, reduction attributes; secondly, found the category tree by the aid of concept lattice. Finally briefly discusses the functional modules´ workflow. Because of the system´s simple structure, low operation error rate, stable operation and good robustness, the system can reach the level of practical application.