An air-conditioning device that is provided with an indoor unit having an air blowing fan accommodated therein and blows out air from the air blowing fan, the air blowing fan being driven by a fan motor, characterized by comprising: a storage unit that is adapted to store a relationship between an upper limit value of an actual rotation number of the fan motor corresponding to external static pressure and a fan rotation number at which a target air volume is generated and which is specified based on the upper limit value of the actual rotation number, wherein an operation controller that controls the air-conditioning device, and a fan motor driving unit that drives the fan motor function as: an air volume controller that is adapted to change a rotation number of the air blowing fan under normal operation of the air-conditioning device so that the air blowing fan is controlled to a predetermined air volume; and a setting unit that is adapted to execute air volume setting processing for measuring the upper limit value of the actual rotation number when the fan motor is set to a maximum output, specifying the fan rotation number at which the target air volume is generated and which is corresponding to the upper limit value of the actual rotation number based on the relationship and setting the rotation number of the air blowing fan to the specified fan rotation number. a storage unit that is adapted to store a relationship between an upper limit value of an actual rotation number of the fan motor corresponding to external static pressure and a fan rotation number at which a target air volume is generated and which is specified based on the upper limit value of the actual rotation number, wherein an operation controller that controls the air-conditioning device, and a fan motor driving unit that drives the fan motor function as: an air volume controller that is adapted to change a rotation number of the air blowing fan under normal operation of the air-conditioning device so that the air blowing fan is controlled to a predetermined air volume; and a setting unit that is adapted to execute air volume setting processing for measuring the upper limit value of the actual rotation number when the fan motor is set to a maximum output, specifying the fan rotation number at which the target air volume is generated and which is corresponding to the upper limit value of the actual rotation number based on the relationship and setting the rotation number of the air blowing fan to the specified fan rotation number. an air volume controller that is adapted to change a rotation number of the air blowing fan under normal operation of the air-conditioning device so that the air blowing fan is controlled to a predetermined air volume; and a setting unit that is adapted to execute air volume setting processing for measuring the upper limit value of the actual rotation number when the fan motor is set to a maximum output, specifying the fan rotation number at which the target air volume is generated and which is corresponding to the upper limit value of the actual rotation number based on the relationship and setting the rotation number of the air blowing fan to the specified fan rotation number.