The invention relates to an MR technology-based power industry business expansion project auxiliary system and a working method thereof and belongs to the power marketing industry business expansion field. At present, industry business expansion service efficiency is low. The system comprises an MR server and an MR terminal connected with the MR server; the MR terminal includes a camera, an interactive voice module, a transparent display screen and an MR terminal control processing module; the MR server comprises a power industry business expansion project information database storage module, a power industry expansion project information input module, a printing module, an OCR identification module and an MR data and image processing module; the MR terminal control processing module, the power industry business expansion project information input module, the printing module and the OCR identification module are all connected with the MR data and image processing module; and the camera, the transparent display screen and the interactive voice module are connected with the MR terminal control processing module. With the system and the working method thereof provided by the technical schemes of the invention adopted, the quality and efficiency of business expansion projects can be improved.