A dynamic heat dissipation method for a heat source inside a wind turbine tower, comprising: acquiring a relatively low temperature area of the wind turbine tower; and driving the heat source to move to the relatively low temperature area, wherein the step of acquiring the relatively low temperature area comprises: acquiring a position of surrounding flow separation around an outer surface of the wind turbine tower in contact with an upward incoming flow according to parameters of airflow outside the wind turbine tower, and taking the position as the relatively low temperature area; or acquiring a position of the shady side of the wind turbine tower corresponding to an irradiation direction of solar radiation, and taking the position as the relatively low temperature area; or selecting a position between a position of surrounding flow separation at the shady side of the outer surface of the wind turbine tower and a position of the shady side of the wind turbine tower corresponding to the irradiation direction of the solar radiation as the relatively low temperature area, and wherein the position of the shady side corresponding to the irradiation direction of the solar radiation is a position which is deflected by a predetermined angle toward a sunset direction. acquiring a relatively low temperature area of the wind turbine tower; and driving the heat source to move to the relatively low temperature area, wherein the step of acquiring the relatively low temperature area comprises: acquiring a position of surrounding flow separation around an outer surface of the wind turbine tower in contact with an upward incoming flow according to parameters of airflow outside the wind turbine tower, and taking the position as the relatively low temperature area; or acquiring a position of the shady side of the wind turbine tower corresponding to an irradiation direction of solar radiation, and taking the position as the relatively low temperature area; or selecting a position between a position of surrounding flow separation at the shady side of the outer surface of the wind turbine tower and a position of the shady side of the wind turbine tower corresponding to the irradiation direction of the solar radiation as the relatively low temperature area, and wherein the position of the shady side corresponding to the irradiation direction of the solar radiation is a position which is deflected by a predetermined angle toward a sunset direction. acquiring a position of surrounding flow separation around an outer surface of the wind turbine tower in contact with an upward incoming flow according to parameters of airflow outside the wind turbine tower, and taking the position as the relatively low temperature area; or acquiring a position of the shady side of the wind turbine tower corresponding to an irradiation direction of solar radiation, and taking the position as the relatively low temperature area; or selecting a position between a position of surrounding flow separation at the shady side of the outer surface of the wind turbine tower and a position of the shady side of the wind turbine tower corresponding to the irradiation direction of the solar radiation as the relatively low temperature area, and wherein the position of the shady side corresponding to the irradiation direction of the solar radiation is a position which is deflected by a predetermined angle toward a sunset direction.