Polyelectrolyte-surfactant complexes are formed by the electrostatic interaction of polyelectrolytes and oppositely charged surfactants as well as the hydrophobic interaction of surfactants in aqueous solution.The complexes may be water-soluble or water-insoluble

depending on the charge density

concentration and stoichiometric of ratio components

etc.The polyelectrolyte-surfactant complexes have a variety of applications.In the paper we review the literature dealing with the aggregating process and structure of the water-soluble polyelectrolytesurfactant complex.The miscellaneous applications of fluorescence spectra to this field are also stressed in the paper.