Abstract: The present invention discloses a device for two-way wireless data transmission comprising a display, and a wireless communication module for wireless communication between two devices for two-way data transmission; and a control chip connected electrically with wireless communication module, which is used for controlling two-way data exchange between two devices for two-way data transmission. The new device for two-way wireless data transmission of the invention, although under the closed environment, can wirelessly achieve two-way data transmission without complicated matching process between two devices in prior art, and can speed up data exchange in two devices, such as smart phone, MP3 of MP4.