The invention relates to a transformer substation intelligent safety monitoring system fusing multi-source safety state heterogeneous data and a safety management and control method. The transformer substation intelligent safety monitoring system comprises a three-dimensional laser point cloud model module, a work ticket management module, an intelligent access control management module, an electronic fence module, an intelligent violation identification module and an early warning management module. The invention discloses a field operation safety management and control method based on a transformer substation intelligent safety monitoring system. The method comprises the following steps: firstly, acquiring heterogeneous data such as personnel position data, field operation video monitoring, two-ticket text information, three-dimensional point cloud and the like by using a Beidou positioning technology, a video monitoring system, laser scanning and the like; then extracting text information of the two tickets by using a natural language processing algorithm based on RPNN, obtaining position information of an operation specified area, and realizing generation of a safety area based on the text information of the two tickets; combining the obtained three-dimensional point cloud data of the production site, and realizing analysis and alarm of an operation safety area through a Beidou positioning technology and a vector criterion; and finally, through a face recognition algorithm based on MTCNN, a target detection algorithm based on RefineNet and a semantic segmentation algorithm based on MaskRCNN, realizing risk recognition of typical violation behaviors of personnel. The system greatly reduces the safety risk of operators, saves human resources, reduces the operation and maintenance cost, and is of great significance for improving the intelligent management level of the transformer substation.