The invention discloses a fan rotating speed adjusting method and a docking station. The method comprises the following steps: a temperature parameter value of a terminal connected with the docking station and a state of the terminal are obtained; and according to the temperature parameter value and the state of the terminal, a target rotating speed of a fan is determined, and the rotating speed of the fan is adjusted as the target rotating speed. According to the obtained temperature parameter value of the terminal and the state of the terminal, the rotating speed of the fan is reasonably adjusted, that is, when the heat dissipating demand of the terminal is lower, the rotating speed of the fan is reduced, and when the heat dissipating demand of the terminal is higher, the rotating speedof the fan is increased, so that the heat dissipating effect of the docking station is effectively improved, and the purposes of reducing the energy consumption and saving the energy are achieved.