Cloud computing technology is receiving attention from many companies and institutes. In order to construct a cloud computing environment, different architectures are being selected and tested for different types of services. Many cloud platforms are contributed to the Apache foundation as part of the trend of open source. OpenStack, CloudStack, and OpenNebula are the representative cloud management platforms. In this paper, the authors select the CloudStack platform to test its function and performance. To check if the functions work well and to test the most important performance aspects of the virtual machine, they constructed a function test-bed and performance test-bed for the virtual machines.