The present invention is related to an issue-manage-style internet public opinion information evaluation management system and method thereof. The system mainly comprises 5 modules of 1) Issue establish/setup module for establishing new issue and the keywords thereof; 2) public opinion information collection module for retrieving and analyzing data retrieved by dredge technology, program, and community web-site open API; 3) public opinion information reputation analysis module for calculating each public opinion information evaluation score by text reputation analysis and community interactive fuzzy analysis; 4) issue trend analysis module for calculating issue trend score by disclosed method based on daily, weekly, or monthly public opinion information reputation evaluation score; 5) issue related public opinion information exchange module for presenting issue related public opinion information on each management interface or message alert of each system via internet exchange standards.