Cooling air inlet temperature adjusting system, crane and air inlet temperature adjusting method

The invention discloses a cooling air inlet temperature adjusting system, a crane and an air inlet temperature adjusting method and relates to the field of engineering machinery, so that the air inlet temperature of equipment, the air inlet temperature of which needs to be adjusted, is in a set range. The cooling air inlet temperature adjusting system comprises a first temperature detection component, a second temperature detection component, a controller, cooling equipment and a fan; the first temperature detection component and the second temperature detection component are electrically connected to the controller, the controller is used for controlling the rotating speed of the fan according to the temperature difference value detected by the first temperature detection component and the second temperature detection component, and the fan blows or inhales an air flow into the cooling equipment. According to the technical scheme, the rotating speed of the fan can be adjusted according to the detected air inlet temperature value so as to adjust the quantity of air entering the cooling equipment to be cooled, so that the air inlet temperature of the equipment is adjusted.