System and method for monitoring energy efficiency of economical coal-fired boiler

The invention discloses a system for monitoring the energy efficiency of an economical coal-fired boiler. The monitoring system is composed of a field data acquisition system, a field monitoring system and a remote supervision and service system, wherein the field data acquisition system acquires real-time operation data of the boiler and sends the acquired data to a remote server; the remote supervision and service system manages, analyzes and issues data received from each site through the remote server, thereby realizing the remote online monitoring of the real-time operation conditions ofthe boiler; and the field monitoring system receives feedback information of the field data acquisition from the remote server, so that a spot fireman can rationally adjust the combustion of the boiler according to the real-time data. The invention also discloses a monitoring method of the monitoring system. The system and the method provided in the invention are capable of continuously improvingthe level of safe and economical operation of the boiler, meeting the control requirements of resource saving and environmental protection indexes of the state and obtaining good social benefit and economic benefit.