e design on operating time of setup alarm clock (F=3.86, P<0.1), which results showed on the figure 1. Fig. 1. The interaction effect of age and hardware interface design on operating time of setup alarm clock The older participants ’ operating time of setup alarm clock by cross hardware interface (M=70.40) was significantly higher than duplet hardware interface (M=45.80).Therefore, the younger participants ’ operating time of setup alarm clock by cross hardware interface (M=26.95) was no significantly with duplet hardware interface (M=23.35). Fourth, there was a significantly different operating time of call someone between younger and older participants (F=6.29, P<0.05). The older participants ’ operating time of call someone (M=49.90) was significantly higher than younger participants ’