Data transmission system and method

Disclosed in the invention is a data transmission system applied to a mobile industry processor interface. The data transmission system comprises a master control device and a controlled device. The master control device includes a control module and a group encoding module; the control module is used for generating a control signal according to a feedback signal; and the group encoding module that is coupled to the control module is used for carrying out encoding on an original group into a transmission group to carry out transmission work according to the original group and the control signal. And the controlled device includes: a group decoding module, which is used for carrying out decoding on the transmission group into the original group to carry out transmission to a display device; and a feedback module, which is coupled to the group decoding module and is used for generating a feedback signal to the control module of the master control device to switch a transmission mode of the transmission work acc