System and method for issuing electronically accredited certificate using encrypted image

An electronic certificate issuing system and a method thereof for protecting an electronic certificate user from damage including hacking or fishing are provided to prevent the abuse of the electronic certificate by using the keyboard hacking. A user selection image selected for the electronic certificate issuance is stored(S308). If the electronic certificate is issued, the electronic certificate is combined with the user option image(S319). The combined digital envelope image is transmitted to the user terminal(S320). The user extracts the electronic certificate by inputting the digital envelope unsealing password(S321, S322). It is stored as the state where the electronic certificate and image are separated(S323, S324).