The invention relates to an operation and maintenance monitoring platform based on big power marketing data. The operation and maintenance monitoring platform comprises a data acquisition layer, a data processing layer and a data use layer. The platform monitors operation conditions of all kinds of computer equipment, network equipment, safety products, application systems and IT equipment and all kinds of network behaviours, performs comprehensive, centralized and unified management of all kinds of equipment, finds all kinds of abnormal conditions in time, rapidly locates all kinds of event failures, automatically forms a work order, and dispatches the work order to a related department to process, such that the closed loop of a flow is finally formed; and thus, monitoring integration, service coverage generalization, monitoring intellectualization and display visualization can be realized. By means of the operation and maintenance monitoring platform disclosed by the invention, a decision-making level of the provincial power company can know whole conditions of various basic units more transparently; a management level can supervise and control works of various basic units more powerfully; therefore, various branch companies can find out weak links more rapidly and accurately; the business and service work quality supervision is improved; and power marketing staffs are technologically helped to comprehensively supervise and manage whole marketing services.