The invention belongs to the technical field of electrical power system informationization technology and efficient energy conservation, and relates to a coal mill multiparameter operation optimization energy-saving system. The coal mill multiparameter operation optimization energy-saving system comprises a system body which is connected with a power plant plant-level monitoring system. The coal mill multiparameter operation optimization energy-saving system is characterized by comprising an application server, a database server and a plurality of application terminals, wherein the application server is respectively connected with a relational database, a plurality of application terminals and a real-time database device in the power plant plant-level monitoring system. Coal mill operation optimization suggestions are given; through actuating the optimization suggestions, a coal mill keeps to operate under the best working condition for a long time; the coal mill electricity consumption is lowered obviously, the effects of a coal pulverizing system are ensured, the safety and reliability of the coal mill are improved; through the actual application in a plurality of thermal power plants, the electricity consumption rate of the coal mill can be reduced by 15% around on average, and the coal mill failure rate is reduced by 20% above; and the coal mill multiparameter operation optimization energy-saving system has better economic benefit.