Encryption communication method and system of mobile terminal

The invention provides an encryption communication method of a mobile terminal. The method comprises steps as follows: a key management center distributes a key for a sending end and a receiving end; the sending end encrypts a signal sent by the key and sending the encrypted signal to the receiving end; after receiving the signal, the receiving end decrypts the signal through the key to restore the signal. The invention further provides an encryption communication system of the mobile terminal. The system comprises the mobile terminal, an encryption communication device and the key management center. The encryption communication method and system of the mobile terminal can guarantee end-to-end encryption transmission of data in a mobile communication system and the safety is high.