The invention belongs to the technical field of local chronicle literature visualization. The invention discloses a local chronicle literature visualization method and system based on WebGIS. The local chronicle literature visualization system based on WebGIS comprises a scanning module, a main control module, a local literature data classification module, a geographic position matching module, adigital graph conversion module, a fusion module, a search optimization module, a data storage module and a display module. The fuzzy set theory is combined through the fusion module, and the fusion efficiency is high. Priori knowledge is added, and the result is more reliable. Meanwhile, targeted vocabulary supplement is carried out on the default lexicon before searching is carried out through the searching optimization module, so that the accuracy of lexical analysis is improved. According to the technical scheme, the calculation formula of the matching degree of the search algorithm is optimized, so that the search result is more accurate, the words at the middle interval are labeled, the semantic characteristics input by a user are protected to the maximum extent, and the reliabilityof the geography knowledge search result is greatly improved.