A catering company can operate in the school cafeteria with a food license issued by the school. According to the relevant public information, catering companies need to obtain a food business license that matches the food type if they want to operate in the school cafeteria, and this license must be issued by the relevant government agencies. Simply put, the catering company has the same type of food business license as the food in the school cafeteria, so it can operate in the school cafeteria.