A virtual machine is transferred between an information processing apparatus and another information processing apparatus via a communication unit which communicates with the other information processing apparatus via a network. For a virtual machine which operates in the virtual machine operating environment of the information processing apparatus, correspondence relationship information representing the correspondence relationship between the virtual machine and a storage unit which stores a virtual disk file to be accessed by the virtual machine is managed using a storage correspondence table. Access from the virtual machine which has issued an access request to the virtual disk file is controlled by looking up the storage correspondence table.