The invention relates to a system of data scene loading of a power information system and a loading method thereof. The loading system includes a multi-scene data storage module, a data scene accessing module, a data scene loading module and a data scene back-storage module. The loading method includes multi-data storage; data scene accessing; data scene loading; and data scene back-storage. The loading system and the loading method are prominently characterized in that data of different scenes are dynamically loaded, and dynamic switching of the data scenes is realized through external data scene accessing and copying of the data among the scenes. Accessing and copying of the data are all realized through a manner of external services, and no impact can be generated on various applications of the system. The data are stored in a manner of scene dividing, thus data interference among the different scenes is avoided, and data processing efficiency can be improved; and switching of the scenes is carried out through a data copying manner, and problems which are simultaneous deployment and dynamic switching of multiple data sources and are caused by direct access are also avoided.