The invention discloses a monitoring control system based on an electric energy optimizing device. The monitoring control system comprises a fault collecting module, a sensing module, an analog-digital conversion unit, a central processing unit, a data memory module, a data exchange module, a dispatching module, a database module, a wireless receiving and dispatching module, a remote control terminal and an upper computer. According to the monitoring control system, centralized monitoring and management can be carried out on each transformer substation, the requirement of manpower can be reduced, comprehensive monitoring for bottom-up information inside the transformer substations is realized to discover problems in time, and managers in a control center can remotely command maintenance personnel to quickly discover and solve the problems, so that the technological process of site viewing and information feedback can be greatly compressed, the time, manpower and material resources of operation and maintenance are reduced, and the pressure that operation and maintenance staff are insufficient at present is relived; and the monitoring control system has the advantages of high structural hierarchy, double safeguard, data reduction, security, reliability and high expansion capacity.