A heating control system configured to control a water circulating pump configured to change a flow rate of a heat medium that circulates through a heat source device and a heat radiation device via a pipe , the heating control system comprising: an outflow temperature sensor configured to detect an outflow temperature of the heat medium that flows out of the heat source device ; an inflow temperature sensor configured to detect an inflow temperature of the heat medium that flows into the heat source device ; and a controller configured to control the water circulating pump , to thereby control the flow rate of the heat medium, characterized in that the heating control system further comprises a flow sensor configured to measure the flow rate of the heat medium flowing through the pipe , and the controller includes a data collection unit configured to collect heat medium information that comprises the flow rate (Fw1) of the heat medium measured by the flow sensor , the outflow temperature (THW1) detected by the outflow temperature sensor , and the inflow temperature (THW2) detected by the inflow temperature sensor , a lower limit flow rate calculation unit configured to calculate a lower limit flow rate of the heat medium that flows when a minimum amount of heat is supplied by the heat source device , based on the heat medium information collected by the data collection unit , and a flow rate control command unit configured to control the water circulating pump based on the lower limit flow rate calculated by the lower limit flow rate calculation unit . an outflow temperature sensor configured to detect an outflow temperature of the heat medium that flows out of the heat source device ; an inflow temperature sensor configured to detect an inflow temperature of the heat medium that flows into the heat source device ; and a controller configured to control the water circulating pump , to thereby control the flow rate of the heat medium, characterized in that the heating control system further comprises a flow sensor configured to measure the flow rate of the heat medium flowing through the pipe , and the controller includes a data collection unit configured to collect heat medium information that comprises the flow rate (Fw1) of the heat medium measured by the flow sensor , the outflow temperature (THW1) detected by the outflow temperature sensor , and the inflow temperature (THW2) detected by the inflow temperature sensor , a lower limit flow rate calculation unit configured to calculate a lower limit flow rate of the heat medium that flows when a minimum amount of heat is supplied by the heat source device , based on the heat medium information collected by the data collection unit , and a flow rate control command unit configured to control the water circulating pump based on the lower limit flow rate calculated by the lower limit flow rate calculation unit . a data collection unit configured to collect heat medium information that comprises the flow rate (Fw1) of the heat medium measured by the flow sensor , the outflow temperature (THW1) detected by the outflow temperature sensor , and the inflow temperature (THW2) detected by the inflow temperature sensor , a lower limit flow rate calculation unit configured to calculate a lower limit flow rate of the heat medium that flows when a minimum amount of heat is supplied by the heat source device , based on the heat medium information collected by the data collection unit , and a flow rate control command unit configured to control the water circulating pump based on the lower limit flow rate calculated by the lower limit flow rate calculation unit . <EOS>