Media playback is unsupported on your device
8 May 2015 Last updated at 10:28 BST
During the war, families would have to ration their food and had little communication in their homes.
Luxuries like chocolate and fruit were very difficult to find and families had to grow their own food to survive.
Watch Martin's report to find out more.
Martin went to the German Occupation Museum to see what life was like for a family living on Guernsey in World War II.