An air conditioning system (100, 100b) comprising: a plurality of indoor units (2a, 2b, 2c) each configured to condition air in a respective target space; and an outdoor unit (1, 1b) connected to the plurality of indoor units (2a, 2b, 2c), wherein each of the plurality of indoor units (2a, 2b, 2c) has a surface temperature measuring device configured to measure a surface temperature of an object in the respective target space, when a total of capacities requested by the plurality of indoor units (2a, 2b, 2c) is larger than a capacity of the outdoor unit (1, 1b), each of the plurality of indoor units (2a, 2b, 2c) performs a process corresponding to a change amount of the surface temperature per unit time, each surface temperature measuring device is configured to measure a distribution of the surface temperature in the target space, wherein the air conditioning system is configured to perform the following control: by analyzing the distribution, an object other than a human body is distinguished from the human body, and a change amount of a surface temperature of the object other than the human body per unit time is calculated, the number of people in the respective target space is specified and surface temperatures of people in the target space are specified based on the distribution of the surface temperature, of the plurality of indoor units (2a, 2b, 2c), an indoor unit having a larger product of the number of people in the respective target space and a sum of the surface temperatures of the people in that target space is operated more preferentially, and of at least two indoor units having the same product, an indoor unit placed in a target space having a larger change amount of the surface temperature of the object other than the human body per unit time is operated more preferentially. a plurality of indoor units (2a, 2b, 2c) each configured to condition air in a respective target space; and an outdoor unit (1, 1b) connected to the plurality of indoor units (2a, 2b, 2c), wherein each of the plurality of indoor units (2a, 2b, 2c) has a surface temperature measuring device configured to measure a surface temperature of an object in the respective target space, when a total of capacities requested by the plurality of indoor units (2a, 2b, 2c) is larger than a capacity of the outdoor unit (1, 1b), each of the plurality of indoor units (2a, 2b, 2c) performs a process corresponding to a change amount of the surface temperature per unit time, each surface temperature measuring device is configured to measure a distribution of the surface temperature in the target space, wherein the air conditioning system is configured to perform the following control: by analyzing the distribution, an object other than a human body is distinguished from the human body, and a change amount of a surface temperature of the object other than the human body per unit time is calculated, the number of people in the respective target space is specified and surface temperatures of people in the target space are specified based on the distribution of the surface temperature, of the plurality of indoor units (2a, 2b, 2c), an indoor unit having a larger product of the number of people in the respective target space and a sum of the surface temperatures of the people in that target space is operated more preferentially, and of at least two indoor units having the same product, an indoor unit placed in a target space having a larger change amount of the surface temperature of the object other than the human body per unit time is operated more preferentially.