The D.R. Congo is a country in Central Africa with the capital Kinshasa and an area of : 2.345.410 km2 having French as official language and 4 national languages. It shares its borders with nine neighboring countries with which it maintains good relations. It is a country with a very rich soil and subsoil with an important hydrography and a fascinating history the D.R.Congo is worth being known in the world. In this book Let''s have the mastery of the D.R.Congo we have talked about the physical-economic geography of the D.R.Congo its history since its origins its colonization and its decolonization in order to allow the reader to have a global idea about the D.R.Congo.