With its special structure, the high surface area and the high active nature, the oxyhydroxide microstructure enjoys high molecular recognition performance,good surface reactivity and electrochemistry properties. The functional unit of the oxyhydroxide microstructure is more and more applied in electrochemistry studies. On the basis of the functional unit's catalytic activity and the oxyhydroxide's structure superiority, this paper reviews the synthesis and applications of supported oxyhydroxide, such as AlOOH and FeOOH, and the application of noble metal, metal oxides, hydroxy oxide and double-layer-like hydroxyl oxide as functional units on oxyhydroxide modified electrodes in electrochemistry, and their prospective development.