RÉSUMÉ
Introduction: Public health is the Science and art of preventing disease And providing, maintaining and promoting health and human capabilities . This concept is expanded in human life area. Therefore, from the international point of view, prophetic missions, policies, duties and public health activities are globalized and expanded from nation to the worldwide society
Method: This article tries to carry out a study to review the documents and resources and find the legal obligations of the international documents in the field of public health policy as well as the challenges facing it .in fact respecting international obligations in hygiene and health by governments can guarantee the health of humans in international society. Access to health services with the purpose of promoting, protecting and providing every single person in society is a basic necessaries in development of any society and it is the right of all human beings to have it. States obligation is seen in the UN constitution, the world health organization constitution, the universal declaration of human rights and other international and regional documents in order to respond to this public health needs . Therefore, paying attention to the importance of international documents and treaties that Encourage governments to put policies in order to maintaining and providing public health seems necessary