The invention provides a remote monitoring system based on an EMS (Enhanced Message Service) system and belongs to the field of remote monitoring. The remote monitoring system based on the EMS system comprises a human-computer interface, a remote client, a remote server and the EMS system, wherein the remote server is deployed on a remote gateway machine of a main adjustment system or a standby adjustment system of a transformer substation and a master station, and functions of providing a remote picture and data service outwards and remotely operating the service are achieved; the remote client is in communication connection with the remote server; the remote server provides remote browsing and remote operation service outwards; the client provides display and operation interfaces; the remote client and the remote server adopt master station systems; the remote server communicates with an EMS by using a service module side master station flexible bus; the remote client communicates with the human-computer interface based on a client module side master station flexible bus.