In terms of expressing the concept of quantity in language, modern Turkic languages are on a par with other developed languages of the world and do not stay behind other languages in terms of the diversity of the concept of quantity (lexical, morphological, and syntactic method). Turkic languages do not recognize boundless and unlimited plurals, duality, trinity, quartet do not show special morphological forms in the language, either representative or distributive plural morphemes are used, the "singular-plural" correlation is characteristic of all Turkic languages. All these features of the quantitative category indicate the level of development of the quantitative category in the Azerbaijani and Turkic languages. In this study, the facts concerning old and midddle Turkic written monuments and modern Turkic languages are compared with the materials of medieval Azerbaijani literary language. The material of other language families was also touched upon to determine the accuracy of the obtained results, as well as to substantiate the scientific opinions put forward. Apart from minor differences, the stages of development of the quantity concept in all languages of the world, and in human cognition, are consistent.