Objective To develop and assess the feasibility of a Question Prompt List (QPL) designed to address the fertility information needs of breast cancer patients of childbearing age, and to provide a tool to support their reproductive health throughout the disease journey. Methods The QPL was developed through a multi-stage process including a literature review, semi-structured interviews, a two-round Delphi expert consultation, and cognitive interviews. A convenience sample of 25 outpatient breast cancer patients of childbearing age was then recruited to assess the feasibility of the QPL. Results Seventeen experts completed both rounds of the Delphi consultation. The expert response rates were 77.27% and 100%, with the authority coefficients of 0.864 and 0.883, respectively. The Kendall′s W coefficients for item importance were 0.122 and 0.124 (both P<0.05). The final QLP comprises 8 themes and 57 specific items. Feasibility assessment showed that 84.00%-100% of patients were satisfied with the list. Conclusion The QPL is clinically feasible. It can help patients proactively initiate discussions about fertility, improve communication of fertility-related concerns, and provide essential information support for shared decision-making.