Abstract: This study analyzes the efficiency of the man-machine interface design based on the scientific and credible industrial design theory, taking the re-design of KF_72LW operation interface as an example. A series of methods were employed in the study including questionnaire, usability test, psychological model experiment, task model experiment and other scientific methods. The framework layer of the interface is found to be unreasonable, and the distribution of the keys illogical. According to the data generated from the experment, the design problems were identified and the interface was re-designed, then the efficiency of the re-design was approved by the independent sample comparison experiment.

Key words: industrial design, scientific experiment, man-machine interface, ergonomics