Indigenous people across the world have been affected by the modernisation through introduction of technologies. Modern technologies, especially tele-communication and computer technologies, allow indigenous groups to participate in the larger societies and economics around them. Some have not dramatically changed their ways of life, while others have completely changed self-identities, entire societies and worldviews. The tribal people of Dooars were originally a floating settler migrating from place to place for land and employment. Gradually they acquainted with the in-migrated tribal people from Chhotonagpur plateau and new form of plantation economy. To make them advanced and integrated with other people govt. initiated developmental programmes. Modernisation and modern way of livelihood and assimilation with the non-tribal people have changed their occupation and larger economy. Attempts have been made in this paper to find out the influences of modernisation in positive and negative perspectives.