The invention provides a uniformity characterization method and a dispersibility characterization method of a titanium oxide surface coating. The uniformity characterization method comprises (1) a step of obtaining chemical components of a plurality of measurement points on the surface of a titanium dioxide sample to be measured; and (2) a step of analyzing and obtaining a difference value between the maximum value and the minimum value of the same chemical element in the coating in the chemical components of the measurement points, wherein the smaller the difference value is, the better is the uniformity of the titanium oxide surface coating. The dispersibility characterization method comprises a step of obtaining a difference value between the maximum value and the minimum value of the same chemical element in the coating in the chemical components of the measurement points by utilization of the characterization method for the uniformity, and, under otherwise identical conditions, the smaller the difference value is, the better is the dispersibility of the titanium oxide surface coating. The methods have advantages of simplicity, practicability, strong maneuverability, speediness, accuracy, and the like.