The seaman's health certificate has been completed, and no catering service can be added. According to the relevant public information, the crew health certificate is a certificate for maritime work, and it does not have the qualifications and authority in catering services. Need to engage in catering services or other industries, need to obtain the corresponding professional qualification certificate or license, in line with relevant laws, regulations and provisions. Seafarer's health certificate is a kind of certificate for maritime workers, which is used to prove that the holder is healthy and suitable for maritime work.