The invention relates to an operator dangerous point warning system in a transformer substation. The system comprises a client and a server, and the client and the server carry out wireless signal transmission through a wifi access point. The client and the server comprise a client module and a server module, and the server module comprises a system user management module, an operator management module, a work ticket management module, a dangerous point management module, a positioning management module, a graphic display management module and a statistical query management module. The systemis scientific and reasonable in construction and convenient to operate. Operators entering a transformer substation production area are tracked and located and the dangerous point database is matchedwith the work ticket management module and the graphic display module, so a warning operation is performed on operators who are close to a dangerous point of a dangerous area, the safety consciousnessof the operators is enhanced, safe operation of a transformer substation is powerfully guaranteed, and the safe operation work level of the transformer substation is further enhanced.