Ramsey came off the bench in Arsenal's last game, scoring in the 5-1 victory over Fulham which stretched their winning run to nine games.
But Emery warned the increasingly optimistic fanbase against getting carried away.
The Gunners are due to host Leicester City on Monday at the Emirates Stadium, over two weeks since their last competitive clash against Fulham. The supporters can enjoy it with us but also we're speaking with our reality every day.
"After, we are going to play Thursday, we are going to play Sunday also, two matches very quickly after Leicester".
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Ramsey has started seven of their eight Premier League games in the current campaign to suggest Emery does consider the Welsh star a key member of his current team.
"Our target now is the same as in the first matches", he said.
Leicester are a very good team and play with a clear identity under Claude Puel.
'We need to stay with the best teams in the Premier League. "To stay with them, we need to do better and get better at different things". Arsenal's attacking trio of Alexandre Lacazette (five goals), Pierre-Emerick Aubameyang (six goals) and Danny Welbeck (four goals) is quite something, as is a midfield that boasts Mesut Ozil, Aaron Ramsey, Alex Iwobi, Henrikh Mkhitaryan, Granit Xhaka and Lucas Torreira.
A contract impasse is likely to see the 27-year-old leave in the summer - while the club may look to cash in on Ramsey during the January transfer window.
Ramsey said during the global break that he has no intention of pushing for a move in January, and Emery urged the midfielder to stay focused on the next match.