Due to the competition in the telecommunication industries, it is important for the service provider to support more attractive services to satisfy customers' needs. The HiFly On-Line Traffic Query System (HiFly On-Line TQS) allows customers to access network usage statistics within the provider domain which relates to services provided to the customers. Basically, HiFly On-Line TQS can be accessed by any web browser through the web at any given time. This paper explains the system architecture, system functions, and related system design.