| The present situation and the level of the inland and foreign study in the theory of airflow temperature forecast is summarized and the existent problems are analysed. By using regression analysis air temperature of bottom of well casing with liquid distribution is analysed systematically receiving forecasting formula of air temperature of bottom well. Basing on mine air heat exchanging principle, air temperature numeration formulas in many kinds of tunnels and at working faces can be deduced. Basing mine air humidity exchanging principle. Not only tunnel wall humidity coefficient conception, bottom tunnel moisture content and relative humidity[RH] calculation but also tunnel wall coefficient of heat transfer and unsteady heating transfer coefficient between wall rock and air fluent can be extracted. Basing on air fluent temperature and humidity numeration formulas, temperature and humidity bilateral iteration can be received. By using multivariant regression analysis, we can derive mathematic repression between welt-bulb temperature and enthalpy, deduce air fluent heat balance equation at working face denoted by welt-bulb temperature and numeration formulas of ah- fluent maximum heat absorption at working face. Discussing criterion to decide whether to increase blast volume to lower the temperature at coal working face, denouncing marginal wet-bulb temperature criterion. Introducing heat harmfulness and existing condition of ventilation system in Sun Cun Mine and analysing the reason of creating hyperthermia harmfulness. Selecting representative air route, assaying related data, drawing temperature variation curve along air route, determining the main cooling months and assaying ground temperature of mining area. Under the real production conditions of Sun Cun Mine, reforming about unstable heat exchange coefficient of wall rock and putting forward the idea about coefficient of correction. Working out software to divine the mine air temperature.
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