Abstract: Due to its easy maintenance, scalability, on-demand and other advantages, public cloud is recognized as the future direction of the development of information technology industry, more and more coal companies began to focus on it. According to most of the core elements for the cost of coal enterprises, combined with the practical cases, discusses the traditional way of software and hardware, electricity, manpower, the whole network access costs, etc. And access to public cloud server instance costs, compared to two KPI in size, so as to help coal enterprises to choose the network is built, put forward the new idea of informatization construction in coal enterprises.