The invention discloses a server group system with single system reflection, including a hardware layer, a distributed virtual machine monitor layer and an operation system layer; wherein, the hardware layer includes a plurality of nodes, a CUP of the nodes supports the hardware virtualization and the nodes are connected via a high-speed network. The distributed virtual machine monitor layer is provided with a virtual machine monitor on the hardware of each node and the virtual machine monitors of the nodes are communicated through bottom communication software and the high-speed network. The operation system layer supports various commercial operation systems of cc-NUMA and existing various cc-NUMA-oriented paralleling software can be operated on the system without modification. Based on the virtualization of the hardware resources, the system achieves the single system reflection of the server group system. The server group system provided by the invention has the advantages of good transparency, high performance, wide application range, moderate realizing difficulty, etc.