Objective: To provide scientific basis for future exploration of nurse-leading cancer genetic counseling by investigating the cognition and attitudes of cancer genetic risk groups on cancer genetic counseling. Methods: A phenomenological approach was used in qualitative research. In-depth interviews and analysis were conducted among 5 cancer patients and 5 blood relatives to collect data. Results: Four primary themes were summed up, including 9 secondary themes: 1) A lack of knowledge about cancer genetic counseling. In ignorance of components of cancer genetic counseling; being suspicious about the effect of cancer genetic counseling. 2) Having demand on cancer genetic counseling. Worrying about themselves carrying cancer susceptibility genes; Worrying about their children carrying cancer susceptibility genes; Being unaware of how to obtain reliable cancer genetics information. 3) Hoping to receive cancer information about cancer risk factors, cancer screening guidance and physical examination knowledges. Hoping to receive cancer information about cancer risk factors; hoping to receive cancer screening guidance and physical examination knowledges. 4) A difference of wills to follow the recommendations of cancer genetic counseling. High ratio of wills to follow cancer genetic tests; low ratio of wills to follow cancer screening and medical examination. Conclusion: Cancer patients and their blood patients lack of knowledge about cancer genetic counseling. But there is a need for it at the same time. They hope to receive cancer information about cancer risk factors, cancer screening guidances and physical examination knowledges through this work. Cancer genetic counseling can be developed to promote the popularization of cancer prevention and screening knowledge. Furthermore, the work of primary prevention cancer can be promoted.