Abstract: The problem of product configuration through Internet is studied considering it in the abstract, i.e. a constraint satisfaction problem. To share and express semantically the product configuration knowledge, a constraint network construction model is developed for product configuration through the object-oriented ontology, then the model is transformed into a distributed constraint satisfaction problem (DCSP) model for solution. Thus, it can represent the construction of parts of a product and relevant design knowledge exactly and completely. In addition, an asynchronous weak-commitment backtrack algorithm is developed to solve DCSP effectively and precisely. An example is given showing the application of the model in the design process of constructional configuration.