Human comfort index evaluates the comfortability of human bodies in different climatic conditions from a meteorological point of view, according to the heat exchange between human body and the atmosphere to develop biometeorological indicators. Comfort index is universal in the application for various seasons. The human comfort index algorithm is studied, and the data is used to revise the standards of comfort classification. The human comfort index collection software is designed for data collection, processing, display and application. After two years of trial operation, it is proved that the software is stable and can meet the operational requirements.