The invention discloses an automatic activation and control method of an intelligent anti-icing and snow-removing control system. The method comprises the following steps of a) setting a minimum temperature limit value T for preventing icing of the road surface; b) setting a water film thickness limit value D for preventing the icing of the road surface; c) setting a snowfall amount limit value S;d) setting a snowfall time length limit value t1; e) setting a spraying interval time length limit value t2; f) detecting a sensor uploading environment condition value of the road surface environment parameters and meteorological parameters, wherein the environment condition value comprises a road surface temperature value TL, a road surface water film thickness value DL, an icing state, a rainfall state, a rainfall type, a snowfall amount SL, a snowfall time length tL1, a spraying interval time length tL2 and a road surface water accumulation icing value Q. According to the invention, the comparison detection value and the reference value are compared, the system can select a spraying scheme which is more suitable for on-site conditions; not only can the ice-removing and snow-removing efficiency be improved, but also the use of deicing fluid can be reduced.