In both the 2002 and 2006 Taipei City and Kaohsiung City Mayoral Elections, we found a paradox between the public opinion polls and the actual ballots casted for the two camps’ candidates: the “green” camp led by the governing Democratic Progressive Party (DPP), and the “blue” camp led by the opposition Kuomintang (KMT). The day before the 2002 Taipei City Mayoral Election, the major public opinion polls showed that up to 70% of the respondents supported the KMT’s candidate Ma Yinjeou, however in the end, Ma received 873,201 votes, which amounts to only 64.11% of total votes. While the same public opinion polls showed that the DPP’s candidate Lee Ying-yuan had only around 20% of the respondents’ support, however in the end, Lee received 488,811 votes, or 35.89% of the total 1,374,862 votes casted in the 2002 election. In the 2006 Taipei City Mayoral Election, in spite of 40 different public opinion polls that placed the popularity rating for DPP’s candidate Frank Hsieh barely above 25%, when the votes were counted, he received 525,869 votes, or 40.89% of the 1,295,790 votes. Although it was still around 160,000 votes behind KMT candidate’s Hao Long-bin, the DPP’s candidate was far more successful than forecasted by the public opinion polls. From these two elections, we conclude that there is a major discrepancy between the public opinion polls and the actual election results, calling many to question if public opinion polls have lost their efficacy; and that they are not scientific or objective, as there is no other explanation for such major errors.