The requalification of the urban network in the capital city of São Tomé and Principe (STP), and the rehabilitation of the urban road structure is necessary, but it is not yet possible a detailed study of the instruments and the management tools and in the process of definition of the urban network in the center area, and Some tools of urban planning and the actual structure of the basic sanitation system are unknown. However, the proposal not only instigates the reader to see from another preservative the resourcefulness of an urban planning with infrastructures already pre-established but also of the opportunity to raise some critics of the future urban planning of the city if São tome.