The invention discloses an information determination method and equipment based on a prior model. The information determination method comprises the following steps: through the pre-established prior model corresponding to set determination characteristics, determining the characteristic weight, which corresponds to each set determination characteristic, of information to be determined; calculating each obtained characteristic weight according to a preset rule to obtain a characteristic total value corresponding to the information to be determined; and according to a comparison result of the characteristic total value and a preset threshold value, judging whether the information to be determined is illegal information, wherein the set determination characteristics at least comprise text characteristics, keyword weight characteristics and content identification characteristics. In the scheme, each determination character of the information to be determined, which is determined on the basis of the prior model, is comprehensively considered to determine whether the information to be determined is the illegal information or not, so that the information determination method disclosed by the invention is more comprehensive, and has the advantages of accuracy in illegal information determination and wide coverage, and meanwhile, the workload of manual determination can be saved.