Antibody-drug conjugates (ADC) is one of the most important approach in recent cancer drug development. ADCs are composed of an antibody and biological active cytotoxic payloads through a specific linker and designed as a targeted therapy for the treatment of cancer patients. ADCs can target to the tumor cells through the antibody part by recognizing and binding to correspond tumor antigen. ADC drugs combine the selectivity of targeted treatment with the cytotoxic potency of chemotherapy drugs.