The invention discloses an information search method, an information search
system and an information search device. According to the method, when the second level cache search is carried out in a search cluster
system, aiming at each subset of a search
server set and according to the corresponding relation between the calculation result and each search
server in each subset, the search
server corresponding to a calculation result which is obtained by carrying out calculating on a keyword on the basis of the setting
algorithm can be respectively selected, and the search request can be responded by using the selected search server; apart from the first response including the search request of a keyword, the selected search server caches a document
list corresponding to the keyword, therefore, the selected search server can directly read the cached document
list, the duration of the search can be shortened, the search cluster
system resource occupied in the
information search process can be reduced and the performance of the search cluster system can be improved.