This study aims to depict the service procedure of sports centers on the basis of theoretical views, and to analyze the service design of customers, service counters and fitness center with the process-chain-network of Sampson (2015) by means of document analysis. Firstly, the service flow chart of the sports center is constructed, which describes the service experience process of customers from going to the venue, receiving service to returning home. Then the interactive network of internal management activities is analyzed, optimized and adjusted. After discussion, it's found that displaying the service procedure with the participation of multiple entities through PCN diagram can clearly show the service areas that need improving. Meanwhile, the overall service efficiency of the sports center can be improved with the optimization principle of service design to assist managers to identify and adjust the service components.