Some 90 people are employed at the centre.
Google says it has converted the former Summa paper mill into an environmentally-friendly building. The centre uses sea water as a cooling agent and wind-generated electricity. Thousands of servers used for e-mail and map services are located in the building.
Google acquired the site from Stora Enso at a price of 40 million euros. The plant was closed in early 2008 with a loss of about 450 jobs.