Abstract: Based on the features of electromechanical products， an evaluation model was proposed for their interactive interface. The features were first decomposed and the typical ones were extracted using similarity experiments. A quantitative semantic model was then built with the hierarchical analysis method and perceptual semantic descriptions can be expressed with quantitative mathematical forms. After that， the mapping between appearance features and operation， and the mapping between property characteristics and functional components were established， respectively. The two mappings determined the expression of the interface features， and the computation over these mappings yields property features， appearance features， utility values of operation， and overall utility values. The evaluation model was proved by the planer machine. The evaluation parameters can help to evaluate the expressiveness degree of the property features by means of the function elements and operation steps.

Key words: electromechanical products, interactive interface, feature analysis, mapping rule, semantic quantization