Human and Machine Interface is the bridge for communication between Human and Machine. It is an intersectional research region, which includes hardware and software. With the swiftness of mechanical technique , micro electrical technique and new computer technique, human and machine interface design of mechanical products has been focused by international computer engineering and mechanical products design engineering. This paper made its research work from two aspects, the hardware and software. It deals with the main two problems of the design -show and control from 3 related courses, cognitive psychology, ergonomics and arts. With the practical products, it builds a cognition model and also conclude the design principles and steps.
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