The invention discloses a real-time online individualized heat-exchanging intelligent temperature control system of mass concretes, and relates to the control on concrete water cooling in a high concrete dam casting procedure, wherein significance is provided for constructions of seamless dams. The system is characterized by comprising 1) installing a sensor in a newly casted mass concrete for measuring the temperature of the concrete in real time; 2) installing an interpolating digital temperature measuring device on water inlet/output pipes to measure the temperature of inlet and outlet water, and determining the average decreasing amplitude of the concrete temperature in real time according to a temperature difference of the inlet and outlet water; 3) determining a real-time flow according to the concrete temperature decreasing amplitude obtained in step 2); 4) installing an integrated flow and temperature control device integrated with temperature, flow and aperture controls on a water through pipe so as to realize real-time and online automatic collecting and feedback controls; 5) realizing the intelligent and individualized control on the mass concrete according to the temperature control information acquisition analysis of a temperature control acquisition instrument and the integrated flow and temperature control device and based on a temperature control gradient curve on time and space, so that an aim of casting the seamless dam is achieved.