NOVELTY - Preparation of microorganism-nanoparticle composite involves adding hollow porous nanoparticle solution to organic solvent (A) containing silane and acid anhydride, stirring, obtaining surface-modified hollow porous nanoparticles, adding product to organic solvent (B), removing supernatant, drying, obtaining graft polymer of hollow porous nanoparticles, dispersing the product in phosphate buffer solution, adding 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and N-hydroxysuccinimide, centrifuging, obtaining activated hollow porous nanoparticles, and dispersing in bacterial solution.    USE - Preparation of microorganism-nanoparticle composite is used for degrading phenol in sewage treatment (claimed).    ADVANTAGE - The method enables environmentally-friendly preparation of microorganism-nanoparticle composite having excellent adsorbing capacity of phenol from liquid waste, and releases adsorbed phenol molecules at higher temperature.    DETAILED DESCRIPTION - Preparation of microorganism-nanoparticle composite involves adding hollow porous nanoparticle solution to organic solvent (A) containing silane and acid anhydride, stirring, obtaining surface-modified hollow porous nanoparticles, adding the resultant product to organic solvent (B) containing N-isopropyl acrylamide, functional monomer, crosslinking agent and initiator, stirring, centrifuging, removing supernatant, re-dispersing precipitate in organic solvent (B), reacting at 60-90 degrees C in nitrogen atmosphere for 7- 9 hours, centrifuging, drying the precipitate in vacuum, obtaining graft polymer of hollow porous nanoparticles, dispersing the resultant product in phosphate buffer solution, adding 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and N-hydroxysuccinimide, stirring, centrifuging, obtaining precipitate as activated hollow porous nanoparticles, dispersing bacterial solution in phosphate buffer, adding activated porous hollow nanoparticles, and obtaining microorganism-nanoparticle composite. The organic solvent (A) is dimethylformamide or dimethyl sulfoxide. The mass ratio of silane, acid anhydride and porous hollow nanoparticles is 2:1:0.1. The organic solvent (B) is dimethylformamide or dimethyl sulfoxide. The functional monomer is acrylamide or methacrylic acid. The crosslinking agent is divinylbenzene or N,N-methylene-bis-acrylamide. The initiator is azobisisobutyronitrile or benzoyl peroxide. The mass ratio of N-isopropylacrylamide, functional monomer, crosslinking agent, initiator and surface-modified porous hollow nanoparticles is 1:1:0.01:1. The mass ratio of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, N-hydroxysuccinimide and graft polymer of hollow porous nanoparticles is 2:1:1. The bacteria is Pseudomonas putida and Paracoccus denitrificans.