Former Chelsea manager Jose Mourinho agreed to let the Portuguese international move to Stamford Bridge, where he joins five compatriots.
Quaresma, 25, can operate on either flank and will fill in for Joe Cole, who has been ruled out for the rest of the campaign with injury.
The Portugal international, who was linked with a move to Tottenham earlier in the day, made six appearances for Inter in the group stages of the Champions League but has failed to impress since joining the Italian champions in the summer from Porto.
At the weekend Quaresma was also subjected to boos from the San Siro faithful during Inter's 1-1 draw with Torino at the weekend. Quaresma played poorly after coming on as a second half substitute and suffered the wrath of the home fans after hitting a shot woefully over the bar.
Inter manager Jose Mourinho said after the game that he would simply have to deal with it and win over his own team's supporters.
"I brought Quaresma on because the team needed more pace and width," Mourinho said.
"He needs to have the mental strength to overcome the criticisms and react in a positive way.
"The San Siro public are not an easy one but we're professionals and we have to react to the whistles.
"He is a player that I wanted in Milan but unfortunately, he has not been able to overcome the criticism directed at him.
"Without confidence in oneself it becomes more difficult."
Argentinian striker Hernan Crespo has yet again failed to make the cut, with Zlatan Ibrahimovic, Julio Cruz and Adriano grabbing Inter's attacking places for the Champions League.
The Serie A leaders take on Manchester United in the first knock-out round on February 24.
Inter travel to Old Trafford for the return leg on March 11.
link: http://www.telegraph.co.uk/sport/footba ... n-loan.htm