acquiring terms in which a user has interest;

extracting information relating to the terms in which the user has interest from a knowledge base in order to display the information in a first display part of a user interface, said knowledge base stores a plurality of terms and information relating to each term;

extracting documents containing the terms in which the user has interest from a document database in order to display a list of the extracted documents in a second display part of the user interface, said document database storing a plurality of documents;

wherein said information relating to each term comprises a property and a relation of the term;

wherein, when the user views content of a specific document in the document list, content of the document is displayed in a third display part of the user interface;

displaying one or more term instances and filtering criteria in a fourth display part of the user interface;

using said term instances and filtering criteria to compose a new query, in order to search a new document list;

wherein said filtering criteria comprise at least one of an AND relation of said term instances and an OR relation of said term instances, and said at least one term instance is input to the system in advance or is dynamically extracted from a previous document list;

wherein said step for acquiring terms acquires the terms in which the user has interest from the first display part;

wherein said step for acquiring the terms in which the user has interest from the first display part further comprises:

displaying a term graph of the acquired terms in the first display part;

composing a new query by extracting said terms and their relevant information from the knowledge base, and submitting the query to the document database;

extracting a list of relevant documents by second extracting means; and

displaying the list of the extracted documents in the second display part;

wherein said step for acquiring terms further acquires the terms in which the user has interest from one of the second display part, the third display part and the fourth display part; and

wherein said step for acquiring the terms, when acquiring the terms in which the user has interest from the second, third or fourth display part, further comprises:

extracting the terms contained in the document list or document content to compose a new query; submitting the query to first extracting means to extract a term graph relating to the terms; and

displaying the extracted term graph in the first display part;

wherein said step for acquiring terms further acquires the terms in which the user has much interest from a fifth display part which is used for the user to directly input specific terms in which he has much interest; and

wherein said step for acquiring the terms, when acquiring the terms in which the user has interest from the fifth display part, further comprises:

extracting the terms contained in the fifth display part to compose a new query;

submitting the query to the first extracting means to extract a term graph relating to the terms; and

displaying the extracted term graph in the first display part.