In some respects, the knowledge and practice about hygiene and safety of street-vended food sellers take the main role because if the street-vended food sellers do not ensure hygiene and safety of food, it will be the big danger for community health. Objectives: To identify the proportion of street-vended food sellers have the right knowledge and practice about hygiene and safety food; and the relating between tranning about hygiene and safety food with knowledge, practice of street-vended food sellers, as well as the relating between knowledge and practice. Method: a cross sectional study was conducted, 126 street-vended food sellers were randomly selected to interview by questionnaires and observe hygiene practice from June to August 2010.