This paper introduces a computational system framework for enhancing design in an evolutionary manner. The framework provides a structure for supporting design activities at the conceptual design stage at different levels of representation and manipulation. With this framework, designers can interactively manipulate design data and develop a solution in ahierarchical manner. Furthermore this system framework provides explorative and adaptive ability through its inter-links with a number of computational evolutionary and generative modules. In this paper, this system framework and its application in the design of wine glasses are presented.