It was announced at the end of the season that the TPL would increase the number of teams for the start of the 2011 Thai Premier League season. Therefore, at the end of season the three teams in the Thai Premier League that finished the season in the bottom three places (14th, 15th and 16th) would face the fourth, fifth and sixth teams from Division One in a promotion/relegation series.
The six teams will be divided into two groups of three. They will meet each other in their group on a home-and-away basis with the winner of each group earning spots in the top flight next season.
It was also announced somewhat belatedly that the teams that finished in the bottom four places, whom would normally be relegated would play in an end of season Promotion/Relegation series against the teams coming 3rd and 4th in the 2010 Regional League Division 2 championship stage. Games would be played on a home and away basis to decide whom would play in the 2011 Thai Division 1 League.
Updated to games played on 23 October 2010.
Source: Thai Premier League Co.,Ld 
Rules for classification: 1) points; 2) goal difference; 3) number of goals scored (C) = Champion; (R) = Relegated; (P) = Promoted; (E) = Eliminated; (O) = Play-off winner; (A) = Advances to a further round.
Only applicable when the season is not finished: (Q) = Qualified to the phase of tournament indicated; (TQ) = Qualified to tournament, but not yet to the particular phase indicated; (RQ) = Qualified to the relegation tournament indicated; (DQ) = Disqualified from tournament.
Rules for classification,When season was finished : 1st points; 2nd head-to-head(Only Match Result, not used aggregate); 3rd match win; 4th goal difference; 5th goals scored