The invention provides an electrostatic guiding device and an inner floating roof storage tank. The electrostatic guiding device comprises an electric wire and an electric floating ball; an insulationlayer is arranged on the outer surface of the electric wire; the first end of the electric wire is connected with an inner floating roof in the inner floating roof storage tank, the second end of theelectric wire is connected with the electric floating ball, and the electric floating ball is made of a semiconductor material. According to the electrostatic guiding device and the inner floating roof storage tank, static electricity generated when the oil and hydrocarbon liquid level in the inner floating roof storage tank is lower than the lower limit of descending of the inner floating roof is guided out, and the safety risk caused by the static electricity is avoided.