3. The apparatus of claim 1 , wherein the question domain distributor distributes a domain with respect to the user's question based on a law dictionary previously established for each domain or a learning model established by using learning data.
3. The apparatus of claim 1 , wherein the question domain distributor distributes a domain with respect to the user's question based on a law dictionary previously established for each domain or a learning model established by using learning data. 4. The apparatus of claim 3 , wherein the question domain distributor includes: a language analyzer for analyzing the language of the user's question; a law-based domain distribution block for identifying and distributing a domain for the user's question based on the law dictionary though the language analysis result; a learning model database for storing the learning model established by analyzing the language with respect to the learning data and through mechanical learning of learning quality; and a learning model-based domain distribution block for distributing a domain with respect to the user's question based on the learning model when a domain is not distributed based on the law dictionary.