Cross-screen interaction method, device and system

The embodiment of the invention discloses a cross-screen interaction method, device and system and relates to the technical field of networks. When the method is applied to a primary display unit of the cross-screen interaction system, the cross-screen interaction system also comprises a secondary display unit in communication connection with the primary display unit. The method includes the steps of transmitting interactive interface information for target information to the secondary display unit to enable the secondary display unit to display an interactive interface for the target information when the fact that cross-screen interaction conditions are met is detected; receiving an operation instruction of a user for the interactive interface, which is forwarded by the display unit; responding to the operation instruction. When the cross-screen interaction method, device and system is used for cross-screen interaction, the interactive interface for the target information is displayed on the secondary display unit, so that the interactive interface is displayed on the secondary display unit while the primary display unit properly displays current content for improving interactive effects.