Due to aggression of monoculture based chemical agriculture the rich biodiversity of the country is endangered. Bangladesh was a rich source of valuable medicinal plants, more than 12,500 varieties of indigenous rice varieties and huge number of varieties of different crops and other flora and fauna. But, very unfortunately every year a good number of flora & fauna are being disappeared from the ecosystem. Within its limited capacity UD has been trying to conserve the endangered biodiversity through especially on farm and ex-situ conservation. UD has conserved about 300 species & varieties of medicinal plants and about 250 indigenous varieties of rice and other crops in its biodiversity conservation centre and in the farmers’ field and homestead.