Ramsey's audacious back-heeled goal put Arsenal in complete control to cap a stunning move that recalled the club's finest days under Emery's predecessor Arsene Wenger. The Gabonese global, Pierre-Emerick Aubameyang was only among bench players in this game but he came on as a substitute in the second half to add two impressive goals to his goal tally this season.
They have also recorded three consecutive away league victories for the first time in two years.
But the former Paris Saint-Germain boss has helped Arsenal quickly rediscover their verve and struggling Fulham had no answer to their enterprising display.More news: Oil prices rise on Iran sanctions, outlook uncertain
Arsenal were battling fatigue after touching down in London in the early hours of Friday morning following a 4,000km flight from Azerbaijan, where they beat Qarabag 3-0 in the Europa League on Thursday.
Alex Iwobi was the catalyst with a clever pass to Nacho Monreal.
Fans on Twitter were left awestruck by Ramsey's strike, with many calling it the goal of the season.
Keown admits he is surprised to see Danny Welbeck being handed his first Premier League start of the season and Henrikh Mkhitaryan make his first league start since August 25.More news: India keeps policy rate unchanged in surprise move, rupee tumbles
It was Arsenal who nearly regained the lead less than three minutes into the second half but Bettinelli pulled off a great save to deny Bellerin from the edge of the box.
Fulham hit back against the run of play in the 44th minute.
Aaron Ramsey extended Arsenal's lead in the 67th minute with a delightful finish. Ramsey flicked the ball into the net from behind his body after another superb passing move that also featured an impudent mid-air backheel from Hector Bellerin.
Aubameyang added a fourth as he swivelled on low cross from Bellerin before side-footing the ball into the far corner. Arsenal took their lead back minutes after the halftime break when Lacazette scored his second goal of the match in the 49th minute.More news: Sen. Hirono: Susan Collins 'Insulting' Ford By Saying Someone Else Assaulted Her