The purpose of the present study was to investigate the relationship among quality of service, satisfaction, and loyalty of citizen sports center. Three questionnaires were utilized for data collection including (a) Quality of Service Inventory; (b) Satisfaction Inventory. and (c) Loyalty Inventory.The sample was 300 members selected from members participating in Jhong Jheng sports center in Taipei. From the survey returned, 243, and the recruiting rate is 81.00%. Descriptive statistics, independent sample Structural Equation Model were computed for data analysis.The results indicated that quality of service and satisfaction, satisfaction and loyalty, and satisfaction and loyalty were positively correlated significantly.