Biamou struck in the fourth minute from close range after Torquay had failed to clear a corner and Bailey doubled their advantage when he converted a 55th-minute penalty.
Bailey coolly converted his spot-kick after Sutton forward Biamou had been brought down by Torquay defender Ben Gerring, who was sent off after receiving his second yellow card for the challenge.
Torquay were not without chances, with Nathan Blissett just inches high with his effort from Dan Sparkes' corner just before the break and Brett Williams just failing to latch on to Sparkes' early cross.
Report supplied by the Press Association.
Match ends, Sutton United 2, Torquay United 0.
Second Half ends, Sutton United 2, Torquay United 0.
Substitution, Torquay United. Chay Scrivens replaces Brett Williams.
Substitution, Sutton United. Chris Dickson replaces Bradley Hudson-Odoi.
Substitution, Torquay United. Jamie Reid replaces Nathan Blissett.
Substitution, Sutton United. Joe Morrell replaces Nicky Bailey.
Substitution, Torquay United. Giancarlo Gallifuoco replaces Luke Young.
Goal!  Sutton United 2, Torquay United 0. Nicky Bailey (Sutton United) converts the penalty with a.
Second yellow card to Ben Gerring (Torquay United) for a bad foul.
Aman Verma (Torquay United) is shown the yellow card.
Ryan Burge (Sutton United) is shown the yellow card.
Ben Gerring (Torquay United) is shown the yellow card.
Substitution, Sutton United. Ross Stearn replaces Daniel Wishart.
Second Half begins Sutton United 1, Torquay United 0.
First Half ends, Sutton United 1, Torquay United 0.
Brett Williams (Torquay United) is shown the yellow card.
Goal!  Sutton United 1, Torquay United 0. Maxime Biamou (Sutton United).
First Half begins.
Lineups are announced and players are warming up.
Sutton United registered back-to-back wins as goals from Maxime Biamou and Nick Bailey secured them a 2-0 victory against 10-man Torquay.