The target of the public booking service system is to relieve the pressure of queue congestion due to the contradictions of supply and demand between people and social resources, achieve a well-ordered management of social resources, and save time spent waiting in line. First, through the analysis of booking resources, this paper proposes a unified booking resources model and achieves the consistency management of all kinds of booking resources. On this basis, this article introduces the basic structure and components of Public Service Booking System; terminal queuing calling system, network application server and Web site. In the end, the paper analyzes the application in Real Estate Trade Center in Sichuan province; the application proves this system is very effective