When the Department of Agriculture (DA) was reorganized in January 1987 under the Executive Order No. 116, the Bureau of Agricultural Extension (BAEx), the Philippine Agricultural Training Council (PATC) and the Philippine Training Centers for Rural Development (PTC-RD) merged, and paved the way for the establishment of the Agricultural Training Institute (ATI).
The ATI started its operations in 1987 with 10 training centers from the former PTC-RD. A year after, more training centers were set up adding nine Regional Training Centers (RTC) and seven Farmers’ Training Centers (FTC).
In 1989, more facilities were installed -- adding seven FTCs, seven Regional Fishermen’s Training Centers (RFTC) and one International Training Center on Pig Husbandry (ITCPH). Since then, a total of 41 training centers geographically located nationwide comprised the ATI's network of training centers.
ATI’s role as the DA’s extension and training arm was strengthened with Republic Act 8435 or the Agriculture and Fisheries Modernization Act (AFMA) of 1997. In November 1998, the RFTCs were turned over to the Bureau of Fisheries and Aquatic Resources, while the FTCs were renamed Provincial Training Centers. To date, ATI is operating with its 16 Regional Training Centers and one International Training Center on Pig Husbandry.
In November 2016, ATI received a plaque of recognition from the Government Quality Management Committee for successfully establishing its Quality Management System leading to its ISO 9001:2008 certification. Likewise, ATI Training Centers in the Cordillera Administrative Region, regions II, VI, VIII, XII, and XIII as well as the International Training Center on Pig Husbandry have earned their certifications after complying the same ISO standards.