The season was one of the most successful ones in the club's history, as Barcelona clinched its second continental treble after winning La Liga, the Copa del Rey and the UEFA Champions League.

In the Champions League, Barcelona overcame Bayern Munich (3–0 home, 2–3 away) to set up the final against Juventus in Berlin, where Barça triumphed 3–1.

At the end of the 2013–14 FC Barcelona season, goalkeepers José Manuel Pinto and Víctor Valdés expired contracts were not renewed.

Barcelona quickly signed Marc-André ter Stegen from Bundesliga club Borussia Mönchengladbach, and Claudio Bravo from fellow La Liga outfit Real Sociedad.

[5] On 12 June, Barcelona and Premier League club Chelsea reached an agreement for the transfer of midfielder Cesc Fàbregas for a reported fee of €33 million.

[8] With the move, Jonathan reunites with his older brother Giovani dos Santos, since both players shared time on the Barcelona youth team.

On 11 July, Barcelona and English club Liverpool announced the transfer of Uruguayan international forward Luis Suárez for a reported fee of £75 million.

[12] The reigning European Golden Shoe winner joins after spending four seasons with the Merseyside club in which he scored 82 goals in 133 appearances.

Barcelona were without Suárez's services after the FIFA Disciplinary Committee banned the player for four months of any football-related activity after he was found guilty of biting Italian defender Giorgio Chiellini during Uruguay's final World Cup group stage match.

[15] Barcelona also informed that left back Adriano would be out four-to-six weeks with an abnormal heart rhythm discovered during his return medical.

The match ended 0–1 with the only goal coming from Barcelona B winger Joan Àngel Román in the 66th minute that gave Barça the Trofeo Colombino for the first time.

[17] On 22 July, Barcelona parted ways with La Masia graduate and youth system all-time leading scorer Bojan.

Bojan moved to English club Stoke City where he joins fellow La Masia graduate Marc Muniesa and ex-Barça striker and current manager Mark Hughes.

[28] On 30 August, Barcelona and West Ham United announced the loan for Cameroonian international Alex Song for the remainder of the season to the Premier League club.

[29] The next day, Barcelona won their first away match at El Madrigal 0–1 versus Villarreal with the lone goal scored by Barça B forward Sandro.

[30] On 13 September, Barcelona played their first match after the FIFA international break and for the first time in their history, wore their Senyera shirts from the previous season in a home game.

This was the official debut match of star forward Luis Suárez due to his ban for biting Italy defender Giorgio Chellini during the 2014 FIFA World Cup.

[42] Claudio Bravo's clean sheet run ended at 754 minutes.. On 1 November, Barcelona played against Celta de Vigo.

Barcelona's losing streak continued as they experienced their first home defeat of the season at Camp Nou; a single goal from Joaquín Larrivey decided the outcome of the match.

Barcelona earned a hard-fought win thanks to late goals from Neymar and Jordi Alba as Thievy Bifouma gave Almería the lead after 37 minutes.

[54] On 10 December, Barca played last match of the 2014–15 UEFA Champions League group stage, against Paris Saint-Germain at Camp Nou.

The lead given by Zlatan Ibrahimović for PSG did not last long, as goals from Messi, Neymar and Suárez gave Barcelona the 3–1 win, ensuring the top spot in Group F.[55] Barça played against Getafe on 13 December at Coliseum Alfonso Pérez; the match ended in a goalless draw.

[66] On 15 January, Barcelona played against Elche in the second leg of Round of 16 of Copa del Rey at Estadio Manuel Martínez Valero.

On 21 January, the first leg of quarter-finals of Copa del Rey took place between Barcelona and Atlético Madrid at Camp Nou, where Barça won 1–0 thanks to a late goal from Messi.

[70] Barça defeated Atlético Madrid in the second leg of the quarter-finals of Copa del Rey 2–3 goals on 28 January at the Vicente Calderón, completing a 4–2 aggregate win.

Barça won the thrilling encounter 3-2 thanks to goals from Neymar, Rafinha and Messi; Denis Cheryshev and Luciano Vietto scored for Villarreal.

[83] On 5 April, Barcelona played their 29th La Liga match at the Balaídos and won 0–1 against Celta Vigo, with the only goal scored by Mathieu.

[91] On 28 April, Barça played its 34th match of the league season against Getafe at the Camp Nou, winning 6–0 as Messi and Suárez each scored a brace and Neymar and Xavi each got a goal.

Neymar scored both goals in a 2–3 Barça loss, though the team nonetheless won 5–3 on aggregate and booked their place in the final of Champions League.

Cornered by four Bilbao players, Messi burst on and managed to beat them all with abnormal ease before running towards the goal and calmly slotting the ball past the goalkeeper.