The invention provides an all-in-one modeling method for a transformer substation and a dispatching master station. The all-in-one modeling method proposes a method for mapping an IEC (international electrotechnical committee) 61850 model to an IEC 61970, based on a unified data model; the all-in-one modeling of the dispatching master station and the transformation substation is realized through the technologies such as the model splitting/consolidating technology and the graphical key information auto-transform technology; and the communication mechanism based on IEC 61850 protocol is realized in the dispatching master station by utilizing the message bus service and MMS (multimedia messaging service) protocol stack of the dispatching master station. With the all-in-one modeling method, the information interaction capability of the transformer substation and the dispatching master station is improved, the model coordination workload between heterogeneous systems, and the 'source end maintenance and whole-network sharing' of models, graphs and data are realized.