Precisiated natural language is a new paradigm in soft computing based on information granulation.This paradigm is placed in central position of many investigations in the field of human machine interaction in these years. Precisited natural language addresses a model for dealing with vagueness of information and suggests a kind of knowledge representation,deduction and computational approach for natural language manipulation.Moreover,ontological architecture is an accepted model for developing this theory. In this work we are going to develop an ontology based question answering system which is one of crucial application of this paradigm. Keywords: Component; precisiated natural language; computing with words; question answering systems; ontology; fuzzy logic; semantic web.