Geometric shape is favored by designers of ideas and becomes the language of art which is never fade by its fade structures, crisp lines and simple descriptions. Product design covers all aspects of the society, and reflects the opinion of a nation’s culture values. The concept of geometric shape is in a field which is close to modern society and culture. This paper firstly analyses how geometric element reflects its aesthetic feeling and intrinsic value from the view of form. Then, the geometric shape modeling method in modern product design is presented to improve the cognitive ability and acquire the infinite power of expression and creation. In the end, a home cordless telephone is designed based on geometric shape, which is a perfect explanation of life and sensation.