The choice of chemotherapy, whether to administer chemotherapy or intravenous chemotherapy, depends on the general status, age and specific pathology of the patient. For example, in the case of elderly patients with advanced bowel cancer and poor general status, the aim of treatment is to improve the general status and prolong survival, and the preferred chemotherapy is chemotherapy with drugs. For younger patients with good general status, the treatment aims to improve the quality of life and prolong the survival as much as possible, or even need to achieve the purpose of radical treatment, intravenous chemotherapy is preferred. Therefore, the specific choice of which chemotherapy modality should also require a comprehensive assessment, all treatment aims, ultimately, to improve the general state of the patient and prolong survival.