The health certificate is required to check the stool, because the health certificate is mainly for workers in the catering industry, or in the pharmaceutical industry, water industry, beauty industry, mainly to check whether they carry some germs to affect the surrounding population. The fecal examination is a routine test, requiring fecal culture, mainly for S. typhi, Vibrio cholerae and S. paratyphi, which are infectious diseases that can have a significant impact on the surrounding population. In addition, when applying for a health certificate, a frontal and lateral chest radiograph should be done to check for tuberculosis, which is a disease transmitted through the respiratory tract and can cause significant health hazards to the surrounding population. In addition, the health card to do routine blood or liver function in the glutathione transaminase examination, check whether there is no significant increase in transaminase. In short, the health certificate should be fully prepared, carrying my identity document, and at the same time to leave stool for culture.