Abstract: During the dam construction of Baihetan hydropower station, the intelligent temperature control system is adopted to finely control the temperature of concrete in the whole process from production, pouring, water cooling to thermal insulation and maintenance. The design scheme of the intelligent temperature control system and the temperature control indexes in different periods are described. Based on using the linear trend method and cumulative deviation method to analyze the continuous temperature control monitoring data of 12-041 casting block from April 18, 2019 to December 6, 2019, the effect of intelligent temperature control construction of mass concrete is discussed.