Gobabeb, a training and research center in the Namibian desert, offers a unique and very untouched environment containing a lot of endemic species. For more than 25 years there have been dry pitfall traps set out in three different ecosystems (Kuiseb river bed, Interdune, Quartz Hill) to catch animals and to monitor them regularly. This report contains the analysis of biodiversity of Coleoptera (beetles) in all three ecosystems using the data of the whole year 2006. The data excludes other caught animals in the dry pitfall traps (e.g. scorpions, geckos, lizards, ants, silverfish, spiders, ... ). To mathematically describe the biodiversity the common Shannon-Wiener diversity index (H') was used. (The exact formula of the index is explained in number 4 "Materials and Methods"). The Shannon-Wiener diversity index takes two main parameters into consideration which PRICE (1984, p.470) describes to the point: 'Thus number of species (species richness) in the community and their evenness in abundance (or equitability) are the two parameters that define H'. As species are added, diversity increases, and as species become evenly distributed in abundance, diversity increases". The results of the Shannon-Wiener diversity index calculation in the three ecosystems in Gobabeb are the basis for the discussion and interpretation, which shall also be handled here. Keywords: Namibia, Namib Desert, Gobabeb, Kuiseb River, desert environment, desert adaptation, desert fauna, desert beetles, ecosystem assessment, ecosystem functioning, biodiversity, population abundance, population dynamics, sampling technique, tenebrionid beetles, Tenebrionidae, Onymacris rugatipennis, Physadesmia globosa, Stips stali, Gonopus tibialis, Stenocara gracilipes.