Sound and light are different stimulus types for human beings. The simple reaction time of auditory stimulus is faster than visual stimulus about 30-50 ms. The stimulus type would effect the response time and operation error rate, so would do the control switch device and the hand movement direction. In this study the testee receives the signal generated from the different frequencies of sound or different light color and then move his or her hand to operate the control switch at once. The reaction time, movement time and operation error rate are measured during the test. A computer program would be used to generate an auditory or visual signal at computer monitor or loud- speaker. Auditory signals include three different frequencies of pure tone i.e. 250Hz, 1000Hz and 4000Hz. Viual signals include red, yellow and green light colors. The control switches labeled "low", "middle" and "high" to control three auditory signals 250Hz, 1000Hz and 4000Hz; labeled"red", "yellow" and "green" to control three visual signals red, yellow and green. The testee put his or her hand on the start-point switch at the beginning. When the signal appears, the testee�s hand departs from the start-point switch, the period of time is reaction time. After the hand leaves the start-point swith for control switch and operates it, the period of time is movement time. These two period of times can be measured by using computer. The reaction time plus movement time makes response time. The tests of different auditory/visual signals to control switches would be undertaken. To compare the differences between auditory and visual signals to reaction time, movement time and operation error rate. The spatial compatibility between signal and control switch device were analyzed in the study. 25 male and 25 female college students in 18-25 years old were tested in this study. Also the differences among reaction time, movement time and operation error rate were compared.