Nowadays, cloud computing, artificial intelligence, big data and other fields are developing rapidly. They all depend on the high load computing of server room. Stable and appropriate ambient temperature is an important condition for the safe operation of the server, but there are always local hot spots or supercooled points in the running machine room. Local over hot spot will threaten the safe operation of the server, which has a great risk of causing the interruption of the operation of the electronic information system, and seriously affects the operation safety of the information system in each computer room. The local subcooling point will reduce the energy efficiency of air conditioning and affect the economic operation. In order to obtain the temperature field data of the computer room accurately and timely, and draw the temperature field cloud diagram to guide the relevant technicians to optimize the layout of the computer room, this paper designs a set of real-time temperature field collection system in the computer room, which provides a graphical user interface that allows data visualization and interaction.