A design evaluation system of mobile devices using virtual reality based prototypes is proposed. The system includes: a storage unit for storing therein 3-dimensional computer-aided design data of a virtual mobile device; a component selection unit for performing a selection among the 3-dimensional computer-aided design data stored in the storage unit and fetching the selected data therefrom; a design parameter setting unit for setting design parameters of the virtual mobile device; a 3-dimensional model visualization unit for visualizing the virtual mobile device to a 3-dimensional model by using the design parameters and the fetched data; a product motion control unit for simulating motions and functions of the visualized virtual mobile device; and a design preference display unit for displaying user design preference for the visualized and simulated virtual mobile device.