Service quality is an important factor that influence customer behavioral Intention for a telecommunication company. Thus, the primary objective of this research was to investigate the impact of service quality on customer behavioral Intention for Chunghwa Telecom. In addition, this study explored the difference in service quality among different characteristics of service staff. This research also assess the difference in behavioral Intention among different characteristics of customers. The data were collected between February and March 2017. A total of 174 valid questionnaires were analyzed. The results of this study are as follows: 1. Service quality has a significant positive influence on customer behavioral Intention for a telecommunication company. 2. The difference in service quality exists among different characteristics of service staff. 3. The difference in behavioral Intention exists among different characteristics of customers.