Abstract: From the software point of view, a method was given to manage the models and data of accelerator, and an application “model manager” was developed. The application uses the Oracle database to save the accelerator models and data. It can draw and compare the different function curves of the accelerator’s models. And it also offers a tool which can do online modeling of the accelerator. It provides convenience for the commissioning of the large-scale accelerator. This method has been implemented successfully on the LCLS accelerator.