Economic sentiment in the euro zone rose by a better-than-expected 1.6 points to 91.1, continuing a recovery started in November last year, the Commission said.
The euro hit a session high against the dollar after the data release, before slipping back slightly to trade around 1.3093 by 1035 GMT.
Economists polled by Reuters had expected a reading of 89.8.
The euro zone was managing to eke out a small recovery, but it was too soon to be optimistic about a broader trend, Capital Economics economist Ben May said.
"Clearly the Italian election and the political uncertainty and the market uncertainty that resulted from that is potentially another trigger for a new downward leg in business and consumer sentiment, and given that this survey predates that I think you certainly wouldn't want to assume you are going to see this continued upward trend in sentiment over the months ahead," he said.
The Commission also said business morale increased by 0.36 points to -0.73, reaching a level last seen in May 2012.
The European Central Bank's unprecedented decision last year to buy the bonds of governments who ask for help calmed the euro zone crisis dramatically, removing the risk for businesses of a break-up of the currency bloc.
The mood in factories brightened in February and managers told the Commission they saw rosier outlooks on expected production and on the size of overall order books. Morale in services also drove the rise in confidence, with service confidence up slightly as managers revised past evaluations.
Optimism was due to "sharp improvements in managers' assessment of the past business situation, and to a lesser extent, their views on past demand", the Commission said.
Consumer confidence increased marginally in the euro zone, by 0.3 points. Consumers were more positive about the future economy in general, but pessimistic about their own ability to save money over the next 12 months.
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(Reporting By Ethan Bilby; editing by Robin Emmott and Rex Merrifield)