Voice input and output database search method and device

A voice input and output database search method that includes: extracting at least one candidate keyword represented by a word or phrase from text information included in a search result; memorizing the extracted candidate keyword and a search state including the search result from which the candidate keyword is extracted in correspondence; and after a new search condition that is different from the search condition and is provided by a voice message has been recognized and a search has been conducted in accordance with this recognized search condition, when a backtracking keyword represented by a word or phrase is recognized together with a backtracking directive that is represented by a word or phrase and backtracks to a search state, controlling on the basis of memory contents so as to backtrack to a search state memorized in correspondence with a candidate keyword that corresponds to the recognized backtracking keyword.