Pierre-Emerick Aubameyang netted twice in the closing stages as Arsenal won six consecutive league matches within a single campaign for the first time since 2016.
Aubameyang completed the rout with a long-range drive in stoppage time.
But the second half they scored very easy goals.
On his potent strike-force, Emery added: "It is one process, to know better after training, after every match, after every decision, how we are better on the pitch, between the players, in our tactical system and impose our timing on the pitch in possession with the ball".
With Ramsey also providing a superb through ball to set up Aubameyang's second - and Arsenal's fifth - his contribution to the win was huge, with all five of Arsenal's goals beautifully worked.
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Ream's first outing this season ended in a 3-0 loss to Everton, and this did not go any better for the United States defender. Arsenal have moved up into third spot and have increased their winning run to nine games.
The Germany worldwide split the two Arsenal centre-backs and his deft lob from Vietto's slide-rule pass deservedly saw Fulham draw level just before the interval.
"We are happy because I think this shows the commitment we have in training and the quality and the understanding of our tactical position".
"The key now is to continue working and keep growing as a team, taking all the competitions as seriously as we did with the Europa League".
"I think his career is just starting and we want to do it with him, he can do it with us, giving us and giving him the best performances at the best level".
Emery said, "Our performance over the 90 minutes was very important; to be together and with our performance we found each moment and each player".