The 25-year-old winger impressed in his side's Premier League season opener on Monday night, scoring from the penalty spot in the 2-1 victory over West Ham United at Stamford Bridge.
Hazard converted from the penalty spot early in the second half while also picking up the Man of the Match award but Conte feels the Belgian has the ability to perform at an even higher level.
"Eden played a good game," Conte told Sky Sports.
"He has great ability and is very important in this team.
"I am very pleased with his performance but I know, and he knows, that he can improve a lot."