With the change of economic patterns, service quality is considered one of the keys to enterprise success. However, the telecommunication service industries have been having a major proportion of Taiwan's economy, and the quality of service is a pivotal factor affecting the operation of the enterprise. This study aims to explore the key factors affecting the telecommunications industry and to explore the differences in service quality requirements in different age levels. The Chunghwa Telecom has been studied object, the results of the interview with the group are as follows: A. Efficiency is the primary focus of service quality in the store service. B. Professional competence is the cornerstone of service efficiency. C. In-service education and training are the driving force for the professional development of staff. D. The professional skills of supervisors are better able to improve service quality. E. Customers of middle-age and elderly needs more care and patience’s service.