With a management server that is connected via a network to at least one physical server including a physical server with a virtualization facility for providing a virtual server to a client and deploys a program to the at least one physical server as necessary, and by a program deployment method for such a management server for deploying a program to the at least one physical server as necessary, there is provided units for detecting one or more nodes which are any of the physical server, the virtualization facility, and the virtual server and connected via the network, acquiring first configuration information about a virtual layer of each detected node for each detected node, and selectively deploying the program to the relevant node based on the first configuration information for each acquired node.