The comfortability measurement system has six components: acquisition, sensor, bracket part, water supply system, communication module, and data acquisition. Except the communication module, the other five parts are design newly. The acquisition unit is the core part of the system, which is responsible for data collection, processing and transmission. The data acquisition software installed on the central server is responsible for data collection, processing, display and storage, remote monitoring and remote detection of the site equipment. The related theories about comfortability are analyzed and the grading standards of comfortability index for the Guangzhou region are proposed. The measurements are also analyzed. The trial operation of nearly one year shows that the system is stable, and the data are reliable, which meets the operational requirements.