The invention relates to the technical field of cloud computing, and particularly relates to a method of a cloud platform virtual network to map a machine room network. The method provided by the invention comprises the following steps: performing separate design on the machine room network through an inner organization structure of a unit, then defining the virtual network on the rear end of a cloud platform, defining logic display on the virtual network on a front end of the cloud platform, and finally flexibly controlling the virtual network in the inner organizations of the unit at the front end of the cloud platform. According to the method provided by the invention, the machine room physical network is managed in the cloud platform, a mapping relationship is established with the virtual network to flexibly manage and control its own network configuration in the inner organizations of the unit, and meanwhile the requirements of the cloud platform to collectively and effectively monitor the network communications of the organizations can also be satisfied.