Abstract: The program of the International Biodiversity Observation Year is underway by DIVERSITAS to study integratedly on the status of global biodiversity in all of its dimensions. The main objects of the program are : promoting the public to understand the status and the future of global biodiversity , pushing forward and perfecting the subject of Biodiversity and providing the scientific basis for policy decisions. DIVERSITAS attempts to understand what do we have in terms of global biodiversity , how much global biodiversity have we lost , why are we losing global biodiversity , what implications do these biodiversity losses have for us , how do we conserve and maintain the biodiversity that we have , what can we do to improve the biodiversity that we have , and how can we integrate and assess the total picture of global biodiversity. Some proposals for the undergoing of the program were also briefly introduced in this paper.