1. A controlling system for environmental comfort degree, comprising: a plurality of sensors for sensing a plurality of environment parameters indoor or outdoor; a plurality of indoor apparatuses for adjusting temperature and humidity of an indoor space; a controlling apparatus, operatively connected with the sensors and the indoor apparatuses, executing an auto-calculation procedure for calculating a current comfort-index of the indoor space based on the environment parameters, and calculating a target comfort temperature adjustment value and a target comfort humidity adjustment value for an indoor environment of the indoor space to reach a best comfort-index based on the current comfort-index; wherein the controlling apparatus controls the indoor apparatuses based on the target comfort temperature adjustment value and the target comfort humidity adjustment value for the indoor environment to reach a target temperature and a target humidity.