The new approaches in linguistics focused on textology outlines the necessity in linguistic study of professional text in the field of ecology from the point of text analysis as integral unity of semantically, grammatical and functional relations within one text system. The integrity of the text represents the result of retrospective or prospective communication with a specific purpose and function and responsible for the structural unity of text and expanding the idea of the text by traditional criteria of textuality. The criteria of textuality of professional text: cohesion, coherence, communicative intention, completeness, informativeness, contextuality and intertextuality as the ability of the text to be related to a specific type. Thus professional text, being the result of communicative activity, is a coherent, logically structured, complete, consists of comprehensive statements that describes the specific profession facility, is adequate for the communicative situation by correspondent language means and can be supplemented by visual means such as symbols, graphs, drawings.