An air-conditioning system comprising: an indoor equipment for conditioning air; and a device comprising a measurement unit adapted to measure temperature or humidity of the air conditioned by the indoor equipment, characterized in the indoor equipment comprising: a transmitter adapted to transmit light or electromagnetic waves to the device; a converter adapted to convert a transmission direction of the light or the electromagnetic waves from the transmitter into plural directions; a receiver adapted to receive detected intensity information that expresses a detected intensity of the transmitted light or the transmitted electromagnetic waves detected by the device; a detector adapted to detect a distance from the indoor equipment to the device and a direction from the indoor equipment to the device based on the plural converted transmission directions and the detected intensities of the light or the electromagnetic waves transmitted in the plural directions respectively, detected by the device, and expressed by the received detected intensity information; and a controller adapted to control an air-blowing state of the indoor equipment based on the detected direction and the detected distance and the measured temperature or the measured humidity. an indoor equipment for conditioning air; and a device comprising a measurement unit adapted to measure temperature or humidity of the air conditioned by the indoor equipment, characterized in the indoor equipment comprising: a transmitter adapted to transmit light or electromagnetic waves to the device; a converter adapted to convert a transmission direction of the light or the electromagnetic waves from the transmitter into plural directions; a receiver adapted to receive detected intensity information that expresses a detected intensity of the transmitted light or the transmitted electromagnetic waves detected by the device; a detector adapted to detect a distance from the indoor equipment to the device and a direction from the indoor equipment to the device based on the plural converted transmission directions and the detected intensities of the light or the electromagnetic waves transmitted in the plural directions respectively, detected by the device, and expressed by the received detected intensity information; and a controller adapted to control an air-blowing state of the indoor equipment based on the detected direction and the detected distance and the measured temperature or the measured humidity. a device comprising a measurement unit adapted to measure temperature or humidity of the air conditioned by the indoor equipment, characterized in the indoor equipment comprising: a transmitter adapted to transmit light or electromagnetic waves to the device; a converter adapted to convert a transmission direction of the light or the electromagnetic waves from the transmitter into plural directions; a receiver adapted to receive detected intensity information that expresses a detected intensity of the transmitted light or the transmitted electromagnetic waves detected by the device; a detector adapted to detect a distance from the indoor equipment to the device and a direction from the indoor equipment to the device based on the plural converted transmission directions and the detected intensities of the light or the electromagnetic waves transmitted in the plural directions respectively, detected by the device, and expressed by the received detected intensity information; and a controller adapted to control an air-blowing state of the indoor equipment based on the detected direction and the detected distance and the measured temperature or the measured humidity. a transmitter adapted to transmit light or electromagnetic waves to the device; a converter adapted to convert a transmission direction of the light or the electromagnetic waves from the transmitter into plural directions; a receiver adapted to receive detected intensity information that expresses a detected intensity of the transmitted light or the transmitted electromagnetic waves detected by the device; a detector adapted to detect a distance from the indoor equipment to the device and a direction from the indoor equipment to the device based on the plural converted transmission directions and the detected intensities of the light or the electromagnetic waves transmitted in the plural directions respectively, detected by the device, and expressed by the received detected intensity information; and a controller adapted to control an air-blowing state of the indoor equipment based on the detected direction and the detected distance and the measured temperature or the measured humidity.