Bangladesh Tea Research Institute (BTRI) an autonomous organisation under the Bangladesh Tea Board (BTB). The tea industry had very limited access to technology immediately after the partition of India in 1947. To solve various problems of growing and manufacturing tea, and to establish the industry on sound scientific footing, the Pakistan Tea Board decided in 1952 to establish a tea research station of its own. As a result the Pakistan Tea Research Station came into being at its present location at Srimangal on the 28th February, 1957. After liberation, the research station was raised to the status of an institute and names the Bangladesh Tea Research Institute (BTRI) in 1973. Now BTRI is one of the 10 National Agricultural Research System (NARS) institutes of the country.

Bangladesh Tea Research Institute (BTRI) is located about 3.2 km away from Srimangal town. It has 3 substations, one at Kaliti, Moulvibazar, one in Sylhet town, and the remaining one at Fatikchhari, Chittagong. The director is the technical and administrative head of the research institute. Chief or Principal Scientific Officers, who are the heads of Research Department or Divisions, assist the Director in formulating and executing research programmes of the institute and offering the advisory services to the tea estates.