A portable electronic device having NFC application function is provided. The electronic device includes a body, a watch-strap portion and a NFC module. The watch-strap portion includes a first watch strap and a second watch strap respectively connected to opposite end portions of the body. The first watch strap and the second watch strap are used to wear the electronic device on a wrist. The NFC module integrates with a plurality of different NFC applications. Therefore, user can use those NFC applications conveniently and safely through the electronic device worn on their wrist.