The present invention provides a method for synthesizing a bifunctional pure organic photocatalytic material with the capabilities of fast adsorption and efficient degradation. By means of reasonably introducing a perylene imide group into an amphiphilic block copolymer, a micelle for treating contaminants in water is formed by self-assembly. The present invention features the advantages in that the micelle formed by self-assembly of the perylene-based amphiphilic block polymer is uniform in size, exhibits ultra-high adsorption capacity on bisphenol A, and can rapidly reach a stable adsorption equilibrium at various concentrations or temperatures. The micelle also demonstrates, in a mixed phenol solution, significant recognition selectivity and good affinity for bisphenol A. In addition, the micelle has rapid degradation efficiency on bisphenol A. The present invention provides a new design concept for the advanced treatment of wastewater by using a metal-free organic material.