Method for interconnecting mobile terminal with car device and car device

The invention discloses a method for interconnecting a mobile terminal with a car device and the car device. The interconnecting method includes the steps that WIFI connection is built between the mobile terminal and a master control module in the car device, the mobile terminal transmits screen display information of the mobile terminal to the master control module in a wireless mode, and transmits compressed display interface data of the mobile terminal and corresponding audio signals to the master control module in a wireless mode, the master control module decodes the received display interface data and the received audio signals, and outputs video signals to a display unit of the car device to carry out display according to the screen display information, and the audio signals are output to a sound card of the car device to be played. According to the method, the car device can be interconnected with the mobile terminal in a WIFI mode, the car device controls the mobile terminal and displays the data information displayed on the mobile terminal, corresponding resources are obtained through the mobile terminal, in other words, the mobile terminal is used as a core processor, and the advantages of the mobile terminal and the advantages of the core processor are achieved at the same time.