Based on the analysis of hypervisor technologies and typical projects on the hypervisor based virtual computing environment, the design of CIVIC (CROWN-based infrastructure for virtual computing) is provided, which has three characteristics. Firstly, it can offer separated and isolated computing environment for users. Secondly, it can also realize hardware and software consolidation and centralized management for computer administrators. Thirdly, it can be transparent to upper layer applications, hiding the dynamicity, distribution and heterogeneousness of underlying resources from applications. The experimental results show that CIVIC can provide a customized computing environment for user easily and efficiently.