The project configuration file in the intelligent substation has multi versions in multi-terminal applications and it brings problems that the archive configuration file might be different with that running set in the on-site intelligent substation. It has negative impacts on the power system operation since a lot of time is necessary for the revision of file setting. On the background, a mirror image management and control technology for smart substation engineering configuration is proposed in this paper. Firstly, a mirror management and control system for smart substation project configuration is designed and it is suitable for multi-terminal applications. And then, a whole process management process of smart substation engineering configuration files is established. Secondly, the intelligent substation engineering configuration verification and comparison are carried out utilizing the cyclic neural network algorithm and the Markov clustering algorithm. Thirdly, the image debugging is run for the intelligent substation engineering configuration file. Finally, a substation reconstruction and expansion project is included to verify that the proposed method can reduce the on-site transmission of reconstruction and expansion, and reduce the period and scope of power outages.