The invention discloses a cobaltless blue color-changing indicator, which comprises 0.01-0.1wt% of color indicator and a granular compound or mixture with a nano-sized microporous structure or adsorptive property, and is free of cobalt. The production method of the cobaltless blue color-changing indicator comprises the following steps of: (a) preparing the solution of a soaking carrier according to claim 3, and (b) enabling the carrier to contact the solution, and drying the carrier. The cobaltless blue color-changing indicator and the production method of the cobaltless blue color-changing indicator have the advantages that the cobaltless blue color-changing indicator can indicate humidity at a relative humidity of 5-90%, is high in sensitivity, and does not contain cobalt, copper, iron and other metal salts, so that the pollution to environment and the harm to human bodies can be eliminated from source; furthermore, the cobaltless blue color-changing indicator is accordant with conventional blue silica gel in appearance and color display and high in commercial value; and the humidity indicator provided by the invention is obvious in color changing effect, simple to use, capable of being repeatedly used for many times, and good in applicability, and has a very wide application range.