Abstract: Monitoring and maintenance of running status of electrical and mechanical equipment is a crucial link for ensuring stable operation of a coal preparation plant. The problems faced by Caojiatan Plant involve, among others, differences in technical competence and skill levels of maintenance personal, inadequate and unsound equipment lubrication and monitoring work, and overload of equipment. As a remedial measures, an intelligent temperature and vibration monitoring is applied. The system is comprised of three parts: wireless data collector, data collection terminal and equipment fault diagnostic platform, which is capable of executing remote monitoring and diagnosis as well as early-warning of failure of equipment. Field application shows the use of the system can effectively guide lubrication work, improve management level and reduce fault removal and maintenance costs of equipment; each year, the number of equipment repaired or replaced is reduced from 31 to 23 while that discarded is cut by 2, resulting in a save of cost of about one million yuan a year; in 2023, the overall equipment breakdown time was seen to be reduced because of realization of intelligent monitoring and improvement of operation efficiency of core equipment; and especially in the third and fourth quarters of 2023, through optimization of algorithmic model, the equipment breakdown time was further reduced by an average of 60.98% compared with the corresponding period in the previous year. The use of the system for real-time monitoring and prevention of fault of electrical and mechanical equipment has led to reduced failure risks and improved management level of equipment, and the building of a high-efficiency equipment operation system, thus effectively enabling the Caojiatan Plant to operate in a safe, steady and highly efficient manner.