Spain international Pedro notched a neat hat-trick, while Argentina international Lionel Messi scored a brace -- including one from the penalty spot -- in a first half appearance that delighted the near 50,000-capacity crowd at Bangkok's Rajamangala stadium.
Second-half substitute Alexis Sanchez scored the visitor's seventh and final goal early in the second half as new manager Gerardo Martino's side cruised to a routine win over the Thai side.
Thailand's star striker Teerasil Dangda scored the hosts' consolation goal from the penalty spot in the last minute of the first-half following a late recovery tackle by young Cameroonian centre-half Frank Bagnack.
Barça are the fourth big name side to travel to Bangkok this summer hot on the heels of English Premier League giants Manchester United, Chelsea and Liverpool who have all toured the kingdom.
The Catalan side return to Asia three years after their last tour of the football-mad continent -- home to a massive fan base and huge potential sums in sponsorship.
The tour is also the final chance for Martino to assess his players in official friendly action before they start the defence of their La Liga crown on 18 August.
All eyes were on Barça's new signing Neymar, after he was reported to have been diagnosed with anaemia.
But the Blaugrana's €57m signing showed no sign of illness in a lively 45 minutes, the highlight of which was his landmark goal from close range in the 12th minute, sparking the rout.
The Brazil international, who joined the Catalans in June, also showed promising flashes of link-up play with Messi as Barça cruised to a 5-1 half-time lead.
Cesc Fabregas, the subject of a major transfer bid from Manchester United, was at the heart of Barça's best moves, his metronomic passing from the left side of the three-man midfield reminding spectators why the club are so keen to keep the playmaker.
The second half saw Barça's first choice midfield of Xavi, Andres Iniesta and Sergio Busquets replace Alex Song and highly-regarded youngster Sergi Roberto.
Fabregas pushed up into the front three as Messi and Neymar also made way. Xavi immediately stepped up the tempo, bouncing the ball off Fabregas before he too withdrew with 20 minutes to play.
Pedro completed his hat-trick with a nicely taken first-time lob on 47 minutes, which Sanchez followed a minute later, tapping home another sweeping Barça move.
Barça travel to Kuala Lumpur on Thursday to play a Malaysia XI on 10 August.