Near Field Communication (NFC) is a standards-based short-range wireless connectivity technology that makes life easier and more convenient for consumers around the world by making it simpler to make transactions, exchange digital content, and connect electronic devices with a touch.
More on their differences here;
http://nearfieldcommunication.org/bluetooth.html
Both use wireless communication.
Bluetooth is short-range with a maximum range of about 30 feet
NFC (Near Field Communication is even shorter with a range of few centimeters (like NFC card to enter your hotel room).
NFC consumes less power compared to Bluetooth.
Because of the range, Bluetooth is more prone to interference with other Bluetooth devices.
Note that the newer Bluetooth known as BLE (low energy type) may use energy comparable to NFC
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