The DIET has to primarily function as the resource centre at the district level for systematic planning and implementation of programs for education and training of teachers for the elementary stage of education system. It is also envisioned that the DIET would be innovate and improve the teacher education programmes induction as well as in-service.

The DIET is institutionally structured to provide services in three areas - training, resource support and research.

According to Government of Meghalaya Notification No. EDN/71/2018/50 dated Shillong 29th May 2019, the following is the Revised Academic Staff Structure for DIETs in Meghalaya the academic functions of each branch of the DIET Thadlaskein