Temperature monitoring and control during mass concrete construction is very important for crack control.In order to monitor the internal temperature of concrete more efficiently and conveniently,we develop a large-scale concrete intelligent temperature monitoring system,which automatically reads and analyzes the temperature of each point of the mass concrete structure through the server in real time,and promptly issues the prompt information of the temperature control technical measures that should be taken on site according to the preset temperature control index. At the same time,the internal temperature change of the concrete can be used to issue a command to the cooling water electromagnetic valve controller to realize the automatic change of the cooling water flow direction and start and stop. The practical results show that the application of this system can greatly improve the temperature control efficiency of concrete,and control the crack extent