2. The method of claim 1 , further comprising: separating the inputted keywords into meaningful words; and performing the syntax analysis on the meaningful keywords, wherein the detecting the intention is performed by using the syntax analysis on the meaningful keywords.
3. The method of claim 2 , wherein the performing the syntax analysis comprises: outputting a syntax expression obtained by analyzing whether the separated keywords have any grammar relationship and semantic relations within a sentence as the result of the syntax analysis.