1. A repetitive fusion search system comprising: a search target database that is configured to store information about targets to be searched for; a searcher information database that is configured to store information about a searcher; a search interface of a computing system that is configured to display a parameter numerical value setting field configured to receive one or more numerical values for one or more instinct based search parameters and a keyword input field configured to receive one or more keywords, wherein the search interface is also configured to receive, from the searcher, input information that includes at least a keyword and a numerical value corresponding to at least one instinct based search parameter to be used for a search, and wherein the search interface is further configured to display the input information and a search result; a search engine that is configured to search the search target database and the searcher information database based on the input information, wherein the search engine is also configured to extract one or more relevant targets, determine a priority of the one or more relevant targets based at least on the numerical value corresponding to the at least one instinct based search parameter, and transmit the one or more relevant targets as the search result to the search interface, and wherein, in response to a selection of a search target by the searcher, the search engine is further configured to estimate, based on a deviation of a search parameter set for the selected search target from the numerical value in the input information, an instinct based search parameter setting criterion deviation for the at least one instinct based search parameter associated with the selected search target; and a database management unit that is configured to manage entering and updating of data in the search target database and the searcher information database.