The invention provides an electronic device and a decryption method therefor. The electronic device is decrypted through touch input in a screen, so that the electronic device is convenient to operate, and intelligent; in addition, after obtaining a read-write access to a memory module of the electronic device, read and write operations can be performed wirelessly through a wifi module, so that the condition that the electronic device is likely to be damaged in inserting and pulling a USB is avoided; and in addition, the electronic device is in a card structure, so that the electronic device is portable.