Data transmission method, device and system for Android intelligent terminal

The invention discloses a data transmission method, device and system for an Android intelligent terminal. A specific implementation manner of the method comprises: monitoring network upload data of an application program; encrypting the network upload data according to network transmission configuration information to obtain encrypted upload data, wherein the network transmission configuration information is used for encrypting and configuring a security policy for the network state; sending the encrypted upload data to a security server through a data security channel, wherein the data security channel is used for protecting the transmission process of the network data; receiving encrypted download data corresponding to the encrypted upload data sent by the security server; and decrypting the encrypted download data to obtain target data, and sending the target data to the application program. By adopting the implementation manner, the transmission security of the network data of the Android intelligent terminal is improved.