Homosexuality has a long history in both Chinese and western culture. This paper explores the historical development of homosexuality and analyzes the impact of Confucianism or Taoism and Christianity on this phenomenon. By such a comparative analysis, it can be discovered that homosexuality has suffered from a varying degree of prejudice, discrimination, oppression and even persecution. Hopefully, homosexuality can be fully understood and all the society can at large develop a healthier attitude, and give them respect, equality and freedom. Homosexuality has a long history in both Chinese and western culture. This paper explores the historical development of homosexuality and analyzes the impact of Confucianism or Taoism and Christianity on this phenomenon. By such a comparative analysis, it can be discovered that homosexuality has suffered from a varying degree of prejudice, discrimination, oppression and even persecution. Hopefully, homosexuality can be fully understood and all the society can at large develop a healthier attitude, and give them respect, equality and freedom.