Bladder cancer chemotherapy can be divided into systemic intravenous chemotherapy and local infusion chemotherapy. In the case of systemic intravenous chemotherapy, at least 4-6 cycles are needed, each cycle is about 28 days, and the treatment should be carried out according to a certain chemotherapy regimen in strict compliance with medical prescription. However, in case of superficial bladder tumors, local bladder perfusion chemotherapy can be administered. Perfusion chemotherapy in principle maintains perfusion chemotherapy for not less than 1 year and requires a strict pattern of perfusion time, such as initially having 1 perfusion per week, appearing to extend to 1 perfusion per month, and then maintaining the concern to last more than 1 year. During this process regular review is needed, and if necessary, cystoscopy or local mucosal tissue biopsy is needed to make further adjustments based on the results of the examination. There are various drugs for perfusion, and different chemotherapy modalities bring different side effects. In case of systemic intravenous chemotherapy, nausea, vomiting, bone marrow suppression, hair loss and other related systemic side effects can occur. In the case of systemic intravenous chemotherapy, systemic side effects such as nausea, vomiting, bone marrow suppression and hair loss can occur.