The invention discloses a classified question-answering system design method based on an associated framework of a data atlas, an information atlas, a knowledge atlas and an intelligent atlas, aims to answer a text question which is put forward by a user in a natural language through atlas query and traversal, and belongs to the technical cross field of distributed calculation and software engineering science. The problems which are put forward by the user can be classified according to different question words, questions guided by question words including who, when, where and the like can traverse and search answers on the data atlas, the questions guided by what can search answers on an information atlas, the questions guided by how search answers on the knowledge atlas, and questions guided by why can search questions on the intelligent atlas. In addition, 5W questions are subjected to overlapping and migration on an aspect of semantic expression, and problems can be correspondingly converted.