The purpose of this paper focused on the trend of screening policies for women breast cancer. According to study of the current breast cancer detecting policies in Taiwan, there are still some limitations concerning breast cancer screening This paper tried to address the related etiology of breast cancer, and tried to elaborate breast cancer screening policies of western countries on account of some evidence-based studies from Medline Journal during 1980~2000. From the results of above data, we suggested some screening policies for our country such as modifying breast-self examination method and providing women above 30 years old free breast mammogram and echogram every three years. Discussions were also made on the cost-effective value of the application of western breast cancer screening policies in Taiwan.