To precisely analyze product information.

Information sharing databases 1a and 1b are stored with common product information and an extraction item setting database 4 is stored with extraction items that an information analyzer inputs while they are classified by 'action objects' and 'action purposes'. At an extraction item setting part 5, the information analyzer sets optimum extraction items of the extraction item setting database 4 to product information from the information sharing databases 1a and 1b according to the contents and the extraction items set by pieces of product information are stored in an information integrated database 6. An information analysis part 7 analyzes the information stored in the information integrated database 6 and totalizes the numbers of pieces of product information by the extraction items and the numbers of pieces of product information by combinations of extraction items of 'action objects' and extraction items of 'action purposes' and the analysis result is displayed in matrix representation at an analysis result display part 8.