The database birth and the development have brought a huge revolution for the computer information management. Database access is an indispensable technology to widely used database application. In industry control area, real-time database provides data for higher level application, and data acquisition service is the bridge to connect between higher level application and real-time database. The load of real-time database is limit, if data acquisition service is not designed well enough, it will bring a heavily load to real-time database. So design a high efficient and low occupy system resource is important to data acquisition service.