The Blues failed to make it into the knockout stages of the Champions League and lost 2-1 in the FA Cup semi-final to Manchester City on Sunday.
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However, Luiz thinks finishing the season with some silverware would be positive for the Blues - with the west London outfit drawn against Basel in the Europa League semi-finals.
He told reporters: "If you win the Europa League and stay to play Champions League next year of course it's a success.
"Some big teams in Europe don't win titles this year, so of course it's a success.
"We have a difficult competition. This season we want to win everything. Now we cannot win the league, but we can stay in the best position and we can win another European title. Work for that.
"The next season is the next season. The future."
Chelsea currently sit in the final Champions League spot and face local rivals Fulham on Wednesday before travelling to Anfield to take on Liverpool on Sunday.