Airline president Piyasvasti Amranand signed an agreement on the matter with Amadeus Asia Pacific's president David Brett.
Mr Piyasvasti said the new system, used by 110 of the world's leading air carriers, is to start at the end of 2013.
The Amadeus Altea reservation system software provides the functions of airlines on sales and reservations, inventory management (flight schedules and seat capacity), and departure control, while outsourcing carriers' information technologies (IT) operations onto a community platform permitting them to share information with code-share partners and airline alliance.
The system can help carriers reduce airlines' IT costs by more than 10 per cent and can boost service efficiency to passengers by 10-15 per cent.
Seventeen of 27 member airlines of the Star Alliance network current use the Amadeus Altea booking system, which the THAI president hopes will help attract more passengers to choose the airline's services.