Considering about the space development in the future, the member of institute of technology should play a key role. There are a lot of researchers taking part in the investigation for space and spreading the study and business chance recently. We will install the several equipments in the satellite. But without passing through the low vibration effect zone at the launching state, our preliminary mission can not be performed. In this paper, we imaged the size of satellite is twenty centimeters cube and discuss the optimum structure design regarding to the analysis of the natural frequency.