Secret data management device and secret data management method as well as mobile terminal

The invention discloses a secret data management device and a secret data management method as well as a mobile terminal. The secret data management device comprises a storage card, a data interaction protocol module and a secret mode management module, wherein the storage card comprises a secret storage region for storing secret data and an ordinary storage region for storing ordinary data; the secret mode management module is used for displaying a secret mode inlet interface and judging whether codes input into the secret mode inlet interface are matched with the preset secret codes or not, if the input codes are matched with the preset secret codes, the secret mode management module enters a secret mode, and the secret data of the secret storage region is displayed; and the data interaction protocol module comprises a specific data interaction protocol unit and a standard data interaction protocol unit, the specific data interaction protocol unit is used for processing the secret data of the secret storage region in the secret mode, and the standard data interaction protocol unit is used for processing the ordinary data of the ordinary storage region in an ordinary mode.