After he died, he was given posthumous titles by many emperors and was greatly revered by later generations, finally becoming a major deity of Buddhism and Daoism due to his virtue and patriotism, and his exemplary speech and behavior, which was unfailingly proper and just.
關羽死後，受歷代帝王的封諡，為後世崇奉，成為釋、道、理三教之護法大神，乃係由於他忠肝義膽，言行自始至終代表著人間一種「正氣」力量。