Aim: The aim of this study was literature review to describe the theoretical and empirical relevance of information-seeking behavior and decision-making of women with breast cancer.Background: Breast cancer patients have complained that their information needs were not being adequately met.Methods: Searches were conducted on the PubMed and ICHUSHI databases from 1990 to 2010 using the key word phrase "information seeking behavior and breast cancer and decision making." PubMed showed 12 matches, but ICHUSHI showed none, so the key word search the literature was broadened to "information seeking AND breast cancer" and "decision-making AND breast cancer." Results: The studies were classified thematically according to the information-seeking behavior concept, information needs, and decision-making preference and experience. First, the author discusses the concept and importance of information-seeking behavior. Second, the author addresses breast cancer patients' information needs and sources. Third, the relevance and assessment of preference and experience are discussed. Conclusion: Information-seeking is thought to be part of the problem-solving process that is aimed at achieving the goals of receiving the best medical treatment, recovering from illness, and improving a patient's health and quality of life. Information-seeking is an important part of decision making with regard to treatment selection and coping with cancer. The information sought by breast cancer patients varies depending on the individual. The information-seeking experience was evaluated based on patients' information needs, hopes, decision-making preferences, and subjective satisfaction rating.