The invention relates to a color change indicating device and transparent ink. The color change indicating device comprises a basal layer, an indicating layer and a protective layer, wherein the indicating layer is formed on the surface of the basal layer and comprises an indicating portion formed by printing of indicating ink, and the protective layer covers the surface of the indicating portion and is formed by printing of the transparent ink. The transparent ink comprises volatile acids, binders, basic materials and solvents, the indicating ink comprises volatile acids, binders, basic materials, solvents and pH indicators, the volatile acids refer to carboxylic acids, the binders are selected from at least one of polyvinyl butyral, nitrocotton, polyvinyl alcohol, hydroxyethyl cellulose and hydroxy propyl cellulose, the solvents refer to alcohols solvents, a pH value of the transparent ink is as same as that of the indicating ink, and concentration of the volatile acids in the transparent ink is as same as that of the volatile acids in the indicating ink. The color change indicating device is capable of preventing a pH value of the indicating portion from deviation.