With the rapid development and wide application of information technology, enterprises and departments have higher and higher requirements for computing power in data centers ( 数据中心 ). Increasing computing power in the limited space of data centers will inevitably have a certain impact on its energy consumption and stability. It needs to be reconstructed and upgraded collaboratively with computer equipment to meet the high thermal density requirements of the data center. This paper takes a data center in Guangdong as an example, carries out a series of optimization designs such as cold aisle closure for its computer room, and summarizes the strategy and ideas for the transition from a traditional data center computer room to a modern Enclosed-Aisle data center computer room. Provide suggestions for the optimal design of traditional data center computer rooms, and promote the construction and development of green data centers.