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Current parametric design generates many possible solutions during modeling and design process, but in the final stage, only allows users to choose one solution to develop. This thesis demonstrates a design strategy for physical parametric design that embeds knowledge from simulation tools and helps parametric design still keep variations after final model. This thesis begins with an introduction of theory and practices of cur-rent parametric design and clarifies the connections between its methods and physical parametric design. Then a few new concepts and prototypes are proposed, and physical parametric designs are demonstrated. The thesis presents a series of case studies inves-tigating specific parametric design methods. Their objectives are studying ways to imple-ment variations from parametric design to physical world and to fix parametric design's constraint problem through the use of physical feedback loop. Some cases are related t