The invention provides a multifunctional
invoice management method. The multifunctional
invoice management method includes S1, recognizing identities; S2,
purchasing invoices; S3, selecting issuing
modes of the invoices; S4, recording
data information of the invoices; S5, encrypting recorded data of the invoices; S6, printing the invoices; S7, decrypting data in
password regions to completely authenticate the invoices; S8, implementing deduction functions of the value-added tax invoices. The invention further provides a multifunctional
invoice management system. The multifunctional invoice
management system comprises an invoice source
control unit, an
identity recognition unit, an invoice issuing unit, an
encryption unit, a printing unit, an
authentication unit and a deduction unit. The invoice source
control unit is used for verifying the authenticity of the paper invoices; the
identity recognition unit is used for recognizing identity information of invoice issuing parties; the invoice issuing unit is used for recording the
data information of the invoices and issuing the invoices; the
encryption unit is used for encrypting the issued invoices; the encrypted invoices can be printed by the printing unit; the encrypted invoices can be decrypted and bidirectionally authenticated by the
authentication unit; the deduction unit is used for carrying out deduction on the value-added invoices.