In order to assess the readiness of patients with urostomy to be discharged from the hospital, an initial questionnaire was created by reviewing relevant guidelines, references, conducting semi-structured interviews, and creating an initial questionnaire. Then, the Delphi method was used for expert correspondence on the content of the entries for assessing the readiness of patients for discharge after urostomy. The results show that in the two rounds of consultation, the positive coefficients of the experts are 90.9% and 100.0%, the authority coefficients are 0.84 and 0.87, and the co-ordination coefficients are 0.341 and 0.362, respectively (all P < 0.000). Eventually, a scale was developed to assess the readiness of urostomy patients to be discharged from the hospital with four dimensions and a total of 30 entries, including physiological status, psychological status, quality of health guidance, and social support. The scale provides a scientific and effective assessment tool for healthcare professionals to improve patient self-management in the postoperative period and to reduce the incidence of complications and readmission rates. It can be seen that this assessment scale has good practicality in clinical practice and can be used as a powerful tool to assess the readiness of urostomy patients for discharge.