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The control system of Shanghai Synchrotron Radiation Facility (SSRF) is a large-scale distributed real-time control system.It involves many types and large amounts of real-time data access during the operating.Database system has wide application prospects in the large-scale accelerator control system.It is the future development direction of the accelerator control system,to replace the differently dedicated data structures with the mature standardized database system.This article discusses the application feasibility of database system in accelerators based on the database interface technology,real-time data access testing,and system optimization research and to establish the foundation of the wide scale application of database system in the SSRF accelerator control system.Based on the database interface technology,real-time data access testing and system optimization research,this article will introduce the application feasibility of database system in accelerators,and lay the foundation of database system application in the SSRF accelerator control system.