1. A question type and domain identifying apparatus, the apparatus comprising: a question type identifier for recognizing a number of words of a user's question to identify whether the user's question is a query for performing information searching or a question for performing a question and answer; a plurality of domain specialized question and answer engines; and a question domain distributor for distributing one of the plurality of domain specialized question and answer engines, as a question and answer engine of the user's question based on the recognized word number, wherein the plurality domain specialized question and answer engines selectively perform information searching or a question and answer with respect to the user's question in response to the distribution of the question domain distributor, wherein the question type identifier includes a word number recognition unit for classifying the user's question as the query for information searching when the recognized word number is one, a declinable word/postposition identification unit for classifying the user's question as a natural language question when the recognized word number is two or more and a predicate or postposition is determined to be included in the user's question, and a question and answer type recognition unit for classifying the user's question as the query or a keyword array type question based on the question and answer type identification result when a predicate or postposition is not included in the user's question.
6. The apparatus of claim 1 , further comprising: a contents search filtering engine for restricting a search target document in the distributed question and answer engine based on question subject information and area information identified through the analysis of the user's question.