For the phase of product configuration in modular design, a process of product module configuration set is put forward based on the feature parameter model of module family. A detailed description is offered on how to generate the mapping relation from user requirements to module feature parameters through Quality Function Deployment (QFD) method. According to this relationship, a model of similarity metrics is adopted to retrieve modules from module base. Hence, a complete approach for constructing product module configuration set and product configuration scheme is offered.