The invention relates to a process for preparing fluorophenol with a photocatalysis method, and belongs to the technical field of chemical synthesis.The process includes the steps that phenol is added into a reaction kettle for heating, then fluorine-nitrogen mixed gas is introduced into the reaction kettle, a reaction is conducted under irradiation of a light source, purging is carried out with nitrogen after the reaction is finished, and crude fluorophenol is obtained; purging gas and reaction tail gas are fed into an activated carbon adsorption tower and a solid soda lime absorption tower in sequence for adsorption, and non-condensable gas obtained finally is emitted to the high altitude; crude fluorophenol is subjected to distillation separation, and 2-fluorophenol, p-fluorophenol, 2,4-difluorophenol and 2,6-difluorophenol are obtained.The process solves the problems that in a present preparation process, the product yield is low, the needed solvent quantity is large, cost is high, and environmental pollution is caused; compared with other preparation methods, other solvents or catalysts are not needed, raw materials can be completely converted easily, the utilization rate of fluorine in mixed gas is high, and production cost is low.