Abstract:The widely spread bacteria of Pseudomonas genus could produce siderophores with different chemical structures and pigments with special colors. These siderophores and pigments confer the Pseudomonas bacteria great practical application potency in diseases controlling and medical researches. In some content, siderophores could be used as a tool for Pseudomonas taxonomy. Pigments produced by Pseudomonas have diverse dues, chemical structures and functions, in addition, some of them also function as siderophores. It is relatively simple to isolate and purify the Pseudomonas’s siderophores and pigments, while the biosynthesis and transport regulation mechanism are complicated very much.