A machine management system capable of improving the degree of freedom in control of an apparatus and installation of an additional apparatus is disclosed. A plurality of refrigerators send, to a virtual machine constructor, information on their own operations. The virtual machine constructor, when receiving such information from the refrigerators, constructs virtual machines corresponding to the refrigerators using the received information, and holds the virtual machines therein. Each time the virtual machine constructor receives new information from the refrigerators, it updates the virtual machines held therein. Controllers receive virtual machines from the virtual machine constructor and hold them therein. The controllers cause one of the virtual machines held therein to be selected and displayed in response to a user's request.